THE SMARTER WAY TO REPAIR YOUR PC

Reinstall windows without losing Anything.

You can use this method as often as you like when you need to repair something that had gotten corrupted and you don't want a clean install. This is better than doing a windows repair install from the cd because doing that can cause changes to settings and even make it so you can't update anymore from microsoft update site because of the 'silent install' they did a year or so ago (unless you rereg some dll files)

1. Start windows xp
2. Go to the location of your source files.
3. Run WINNT32 /unattend for example, D:\I386\winnt32 /unattend (copy & paste this command into the run box, then press ENTER ) OR START > ALL Programs > Accessories > Command Prompt. Copy & Paste > D:\I386\winnt32 /unattend ( NOTICE the space between 32 amd / ) PRESS ENTER.
If you have i386 on your drive, you can replace 'D:'. ( If D: if your cd drive ) with the location of it. ( be sure it's the full i386 though ) D: is the drive letter where your windows xp cd is if D:\I386\winnt32 /unattend DOESN'T work then try this D:\winnt32 /unattend.

This is really effective method rather than to format your PC.