File sharing is the practice of distributing or providing access to digitally stored information, such as computer programs, multi-media ( video, audio), documents and electronic books. It may be implemented through a variety of storage, transmission, and distribution models and common methods of file sharing incorporate manual sharing using removable media, centralized computer file server installations on WWW(world wide web) based hyperlinked documents, computer networks, and the use of distributed peer-to-peer networking.

Easy File Sharing Web Server is a file sharing software that allows visitors to upload/download files very easily through a Web Browser (IE, Mozilla, Netscape etc.). It can help you share files with your users, customers and partners. They can search for and download files from your computer or upload files from theirs. The files on your PC can be accessible from anywhere without using of any special software . Easy File Sharing Web Server also provides a Bulletin Board System (Forum). It makes it easy for remote users to post messages and files to the forum. The Secure Edition adds support for SSL encryption that helps protect businesses against site spoofing and data corruption.

You can create a virtual folder from your hard disk ,visitors may upload/download files to/from it. Easy File Sharing Web Server is much easier to use than a typical FTP (file transfer protocol) server. It is also a web based file management solution that allows you to manage files on your web server just with a web browser instead of a FTP client, it also provides extended features which are impossible with FTP such as zipping and unzipping files.

Hackers are always try to get into computers of other persons. It can be something as simple as phising confidential information ( like bank account numbers or credit card ) to complex hacking routines that use your computer as a repository for illegal content (like movies or music with copyright).

Unfortunately there is no magic or any software to prevent hackers directly   and it will never exist in future. It doesn’t matter how much money or resources we invest to design the perfect system, somebody will always try to find the way to crack it. Even the biggest government agencies like NASA, CIA and NSA have been victims of hackers but they can’t do anything and the same thing happens in the private sector with companies like Citigroup or Wal-Mart and many more.

The first thing we have to take care that in computer hacking prevention is to assure yourself that all your software is up to date, especially our operating system and our web browser.  Because they are the two things that hackers will try to attack first if they want to get into your computer.

The second thing that we need to do is to install a firewall. Internet firewall hacker protection has become so necessary that Microsoft now ships it for free as part of their Windows XP operating system to protect our pc.

At the end, there should be the anti-spyware program. As if viruses were not enough, companies from around the world decided to create programs that could pick up data from your computer in order to acquire information for their databases. It may not be as dangerous as a virus, but it is an intrusion to your privacy. Wipe them out with this piece of software.

Before you think to create a backup, you have to arrange your files in an order. It doesn’t mean that you have to arrange each and every file in a different folder. You only make sure that all the essential data files are stored in one easy to find location.

People who use their computer occasionally (7 hours/week or less) should be backing up their data on at least a weekly basis. If you use your computer more frequently, however (more than 12 hours/week), doing it daily is probably a great idea.

How to Backup:

You can set up automatic backups or manually back up your files at any time whenever you want,for that you have to pass through the following steps:

1. Clicking the start button

2.Clicking the control panel

3.Clicking System and Maintenance, and then clicking Backup and Restore.

Notes:

• Never back up your files to the same hard disk that Windows is installed on.
• Always try to store media which is  used for backups (external hard disks, DVDs, or CDs) in a secure place to prevent unauthorized people from having access to your files.

A dynamic link library (DLL) is a collection of small programs, which can be called upon when needed by the executable program (EXE) that is running.

The Compiled library files are  containing a set of  drivers and/or procedures that are referenced and executed by a program that allows multiple programs to access shared system functions through common libraries and It may be dynamically linked into a program at runtime.

Most of the  DLL files are provided with the Windows operating system, and others are included by Windows programs and they allow various program functions, such as communication with external devices and hard disk input and output and it can be referenced by Mac cross-platform applications.

An example : If the program (exe) needs to get the free space of your hard drive. It can call the DLL file that contains the function with parameters and a call function. The DLL will then tell the executable the free space. This allows the executable to be smaller in size and  haven’t to write the function that has already exists.

COMDLG32.DLL

It controls the dialog boxes.

GDI32.DLL

It contains numerous functions for displaying text, managing fonts and drawing graphics.

KERNEL32.DLL

It contains hundreds of functions for the memory management and various processes.

USER32.DLL

It contains numerous user interface functions. It involved in the creation of program windows and their interactions with each other.

NOTE: The contents of a DLL file may cause errors within the program that references the file when deleting or modifying; for this reason, DLL files generally should not be opened or edited.  See here – “How to Open a dll file ?“

A hidden directory or hidden file on a computer is a directory (folder) or file which a user can’t see by default. The Hidden directories/files are  most often serve to hide important operating system-related files and user preferences.

Showing hidden files  is not a big task—for example, If we want  to delete everything from a floppy disk and the disk properties still indicate 100K of disk space which is  used by hidden files.

To see hidden files:

Note :To access Windows Explorer, click Start, point to All Programs, and then click Windows Explorer.

Not every movie file on the Internet has the same file type. Windows Media files are different than QuickTime movies, which are not the same as Real media files. Each format has specific uses and run through specific programs. Here are some of the most common movie file types you will find on the Internet.

Windows Media File

Windows Media video files (or .wmv) are one of the most popular movie file types on the Internet. They are played in the standard Windows Media Player that comes with all Windows computers.

QuickTime Movie

The QuickTime movie format (or .mov) is Apples equivalent to Windows Media Video files. It is very popular because this proprietary video format can be played on both Mac and Windows computers. .mov files are played by apples QuickTime player.

Real Media file

Real media files (or .rm) are files that can be completely downloaded before playing, or can be streamed directly from the Internet. These files can contain audio data, video data, or both. Real media files are
played on the Realnetwork’s Real Player.

MPEG

Moving Pictures Expert Group (or .mpg) files contain compressed audio and video data. MPEG files can be played on either QuickTime or Windows Media Player.

DIVX

DIVx files are high quality compressed movie files. It allows videos to be a lot smaller data-wise while still delivering crystal clear video. There are quite a few different programs that will play these files, but
DIVx does offer a downloadable program that will play these files.

SWF

SWF files are animation files that are created by Adobe Flash. They can contain audio and visual imagery, but instead of movies, the visual components are usually vector images. SWF files are vey popular in web
design and advertising applications. Any web browser with the downloadable flash player plugin can view these files.

What if you are trying to play a video file that is not listed above?

If you have a video file that you would like to play, but is not in one of the above formats, you are going to have to do some extra research to find the correct player or codec. If you type the file extension into
almost any search engine, many results will pop up and give you information on the necessary software needed to execute your given file type.

Many times, when you are running a virus checker on a windows machine, a file called csrss.exe will pop up and the end prompt and show that it is infected. You don’t really know what this file does, or if you need it.
It looks like a Trojan or a virus. You say to yourself “I don’t need this file. All it does is cause problems. I am going to delete it!” STOP!

The csrss.exe file is stored in the c:\windows\system32 folder. It is a critical system process that will cause very big problems if removed. Don’t even try removing it from the task manger. It will still cause operational problems in your operating system. Don’t touch it.

Now, this is a critical system file, but it is easily infected by spy ware and trojans. That’s why it is always showing up in your virus checker. It is best to let your antivirus program deal with this and not worry about it.
There are rare cases when this file will become corrupted. One of the ways you can find out if this file is corrupted is by simply opening your task manager. If it is using over 95% of your CPU or another abnormally high amount, there is a good chance this is the problem.

Don’t worry, though, this problem is easily fixed. This problem is related to a corrupt windows profile. Here is an easy way to remedy this problem.

1. Backup all necessary files in the profiles “My Documents” folder.
2. Log out of the account and log in (or create) another windows account
3. Click “My Computer”, then “Properties”
4. In the window that pops up, click “Advanced”
5. Click the settings button under “User Profiles”
6. Highlight the name of the profile you are having problems with and delete it!

Once you have completed this whole process, you can recreate your windows profile and replace the my documents folder.

The csrss.exe file is an essential operating system file. Tampering with it if you don’t know what you are doing can create some major problems. Let your antivirus program deal with it.

If you see this file on your computer, you should not be worried. This is one of the files that Windows needs to run. It is one of the system files that you should have on your computer, and you should not delete it.

Normally it is located in the c:\windows\system32 or c:\winnt\system32 directory and can also be found in the c:\i386 directory. It has a description as a „NT Layer DLL“ and it contains NT kernel functions.

This file is not a security threat to your computer. Anyway a virus or a trojan can infect different files, so you should use an anti virus program to scan your computer. Even if the anti virus finds a virus within this file, you should not delete it but you should disinfect it, because your Windows system will need it. If you have an anti virus software installed on your computer, that regulary checks all the programs that you install and all the internet sites that you visit, you should not get such problems at all. Regular anti virus check should be scheduled.

There are users, that experience some errors in Internet Explorer, but this is not an effect of the file but this happens because of other add ins, also called plug ins. These are small programs, that you can install manually and they change your Internet Explorer. So if you experience such problems try to deinstall the last add in that you installed and the problems should go away.

If you still have problems, then you should consider downloading the file from the internet and replace the original file, but you should only do that if you are really sure, that you know what you are doing.

Database files are used to store different information about what files or information are you using on your computer. Most of them are hidden files, so you do not even see them when you browse through your directories with Windows Explorer, because they are hidden and not showed by Windows by default. You can change these settings in Windows Explorer under Tools – Folder options – View – Show hidden files and folders. Now you can see all the hidden files and with that all the database files. The most common database files that are going to be described in this article are the .db

The .db files, are also called Paradox database file or Progress database file. These files are used to store information, that the system is going to use later and it could acquire it later, but it is faster if the information is stored in it. The most common .db file is thumbs.db, a file where the windows store information about the pictures that are in each folder. As said, the information can be gathered at any time, and that means that you can delete this file if you wish. But it will be later created again, when you access the pictures that you have in a folder.

DBX files are database files, that are used to store information from different programs. One of them that is often used by regular users are the Outlook Express database files. All the emails that you see in your Outlook Express are stored in these files, based on the folders where you have the emails stored. If you would like to delete the emails, or store them to use them on another computer, you use these files. The DBX database are connected with with DBT database files. The DBT files are temporary copies of the DBX files, a way of security, if something goes wrong with the original files you can use the DBT files to restore the information.

Here is a list of other database file extensions:

• .ABD – AmBiz Bonus Calculator data fileAdventure Builder database
• .APX – Appexpert database file (Borland C++ 4.5)
• .BDE – Borland Database Engine
• .BSC – Compressed Apple II file archive created by BINSCIIDatabase (Source Browser)Pwbrmake object file (MS Fortran)
• .BTR – Btrieve Database file; MS Frontpage-related file
• .CDB – Card database (CardScan)Main database (TCU Turbo C Utilities)
• .CIX – Database index (TCU Turbo C Utilities) 
• .CRP – Encrypted database (dBASE IV)
• .CVT – Backup file for CONVERTed database file (dBASE IV)
• .DB – Configuration (dBASE IV – dBFast) Database (Paradox – Smartware)
• .DB2 – Database (dBASE II)
• .DB3 – Database (dBASE III)
• .DBB – ANSYS Database BackupMopheus music file
• .DBF – Database file (dBASE III/IV – FoxPro – dBFast – DataBoss)Oracle 8.x Tablespace File
• .DBK – Database backup (dBASE IV)
• .DBS – Database in SQL Windows formatDatafile (PRODAS)Printer description file (Word – Works)
• .DBX – DatabaseDataBeam ImageMS Visual Foxpro Table
• .DIF – Database (VisiCalc)Output from Diff command – script for Patch commandText file (Data Interchange Format)
• .DSD – Database (DataShaper)
• .DTF – Database file (PFS – Q&A)
• .DWG – Drawing (Drafix)Drawing database (AutoCAD)
• .EDB – MS Exchange Database ROOTS3 geneological data
• .FW – Database (FrameWork)
• .FW2 – Database (Framework II)
• .FW3 – Database (Framework III)
• .GDB – Interbase Database Group Mail file
• .HIS – Insight II Dynamics Trajectory History fileSpy-CD CD Search Database file
• .IOB – 3d graphics database in TDDD format
• .IPD – InstallPROG 6 EDBS Install Database
• .MB – Memo field values for database (Paradox)
• .MDB – Database (MS Access)
• .MDF – Accelio Capture Classic (JetForm) FillerI-deas Master Drafting Machine Data file Menu Definition file MS-SQL Master Database file
• .MPD – MS Project database file
• .MVB – DatabaseMS Multimedia viewer file
• .NDB – Network database (Intellicom – Compex)
• .NG – Online documentation database (Norton Guide)
• .NSF – Lotus Notes / Domino database
• .PFS – Database (PFS:FILE) – text file (PFS:Write)
• .PHO – Phone database (Metz Phone for Windows)
• .PQA – Palm Query Application File (database for wireless access)
• .PX – Primary database index (Paradox)
• .QAD – QuickArt database
• .RDB – TrueVector Rules database, ZoneAlarm Rules database
• .RPD – Database (RapidFile), RosaPro file, RPV Printing System file
• .TDB – Database (TACT)
• .THM – Microsoft Clipart Gallery database, Serif DrawPlus Theme
• .UCS – Universal Classification Standard Database file
• .WDB – Database (MS Works)
• .ZBD – Canon ZoomBrowser Database file
• .ZTD – Ziff Davis Media text database