How to increse Virtual memory

To increase the virtual memory follow the steps below:-

Step 1
Goto the Start and right-click on My Computer.

Step 2
Choose Properties.

Step 3
Now just click on the "Advanced tab" ----> Under Performance ----> click on the Settings button.

Step 4
Under Virtual Memory, click on the Change button.

Step 5
Here you can decide Virtual Memory that you actually need. Write the number that you actually need and click ok.

Step 6
An alternative way to fix your low memory problem is to eliminate non-essential programs, documents and files from your computer's hard drive. This will allow you to free up space that can be used by your computer as memory.

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How to increase the performance of Windows XP

Follow the steps below to speed the performance of yor PC

1. go to Start menu.
2. go to Run
3. type regedit
4. from registry editor go to the following section: HKEY_LOCAL_MACHINE\SYSTEM\Current Control Set\Control\Session Manager\Memory Management\Disable paging Executive
5. Now click the Disable paging executive and make its value 1.
6. Click Ok.
   

Now restart your computer.
This process increase the overall performance of XP. You can try it in Vista also

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.

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How can you backup and restore the windows Registry?

Windows 95
Microsoft included a service on the Windows 95 CD-ROM that lets you create backupes of the Registry on your computer. The windows support Configuration Backup program, CFGBACK.EXE, can be found in the \Other\Misc\Cfgback directory on the Windows 95 CD-ROM. This utility lets you create up to nine different backup copies of the Registry, which it stores, with the extension RBK, in your \Windows directory. If your system is set up for multiple users, CFGBACK.EXE won't back up the USER.DAT file.

After you have backed up your Registry, you can copy the RBK file onto a floppy disk for safekeeping. However, to restore from a backup, the RBK file must reside in the \Windows directory. Windows 95 stores the backups in compressed form, which you can then restore only by using the CFGBACK.EXE utility.

Windows 98
Microsoft Windows 98 automatically creates a backup copy of the registry every time Windows starts, in addition to this you can manually create a backup using the Registry Checker utility by running SCANREGW.EXE from Start | Run menu.
What to do if you get a Corrupted Registry
Windows 95, 98 and NT all have a simple registry backup mechanism that is quite reliable, although you should never simply rely on it, remember to always make a backup first!

Windows 95
In the Windows directory there are several hidden files, four of these will be SYSTEM.DAT & USER.DAT, your current registry, and SYSTEM.DA0 & USER.DA0, a backup of your registry. Windows 9x has a nice reature in that every time it appears to start successfully it will copy the registry over these backup files, so just in case something goes wrong can can restore it to a known good state. To restore the registry follow these instruction:
1. Click the Start button, and then click Shut Down.
2. Click Restart The Computer In MS-DOS Mode, then click Yes.
3. Change to your Windows directory. For example, if your Windows directory is c:\windows, you would type the following:
cd c:\windows
4. Type the following commands, pressing ENTER after each one. (Note that SYSTEM.DA0 and USER.DA0 contain the number zero.)

atttrib -h -r -s system.dat
atttrib -h -r -s system.da0
copy system.da0 system.dat
atttrib -h -r -s user.dat
atttrib -h -r -s user.da0
copy user.da0 user.dat

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Source:
http://www.tutorial5.com/content/view/156/47/

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How to build, upgrade, or repair, your own PC Computer

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Incremental Data Backup

Incremental data backup technique allows you to backups all the files that have been modified since the most recent normal or incremental backup performed. The presence of the archive bit indicates that the file has been changed and only files with this attribute are backed up last time. When a file is backed up, the archive attribute is cleared. If the file is later modified, this attribute is set, which means that the file needs to be backed up.

An incremental data backup is a process in which several backups are kept (not just the last one). These backups will be incremental, if each original piece of backed up information is stored only once, and then successive backups contain only the data that changed since a last backup.

Let’s assume if you perform an incremental backup on Tuesday, you only back up the data that modified since the incremental backup on Monday. As a result, it’s faster backup technique. The plus points of incremental backups are the short backup duration and the less data to be backed up.

Incremental backup technique offers much greater flexibility and perform backup at rapid speed. However, the process takes longer time to restore because the backup has to be reconstituted from the last full backup and all the incremental backups.

Conclusion

Incremental data backup is a faster method of backing up data than frequently running full backups. During an incremental backup only the files changed since the most recent backup are included. That is why it gets its name: each backup is an increment since the most recent backup.

Advantages

• Backup time is faster than full backups.

• Incremental data backups require less disk space, tape, or network drive space.

• You can keep multiple versions of the same files on different backup sets.

Disadvantages

• During a restoration process, you must have all of the incremental backups available.

• It may take longer to restore a specific file since you must search more than one backup set to find the latest version of a file.

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