I think most of yours might experience as your windows pc continually reboots. It did not start sucessfully…” screen then goes to the Windows XP splash screen and reboot. It keeps on repeating this process.
How to solve this problem:
- Press F8 at bootup and select “Last Known Good Configuration” then Enter. If this doesn’t work, then you might try system file checker. Go to the safe mode command prompt and type sfc /scannow. Note: space between c and /
You may be asked for the Windows CD, if asked insert it.
Another solution: Perform disk error checking in Windows XP
- At the Windows Setup screen, press R to enter the Recovery Console.

- You will enter the Recovery Console and be asked to choose which Windows installation you would like to log into. Most users will only have one choice.

- You will be prompted to enter the administrator password. This is the password set for the user Administrator. You may have set this password when you first were configuring your computer. If you are uncertain what password to enter here, try leaving the line blank and just pressing ENTER.
- You will be presented with a C: prompt. Type chkdsk /r and press ENTER.

- Checkdisk will now run. The scan may run for several hours or lesser. It depend on your HDD Space. When the scan is complete, a report similar to the one below will display
To leave the Recovery Console and reboot your computer, type exit and press Enter.
Now your Windows PC should be back to normal. Just try it!!