|Please answer ALL of these questions that apply to your case.|
Does this computer have only one hard drive?
When you boot are you given the choice of two XP installations to boot from?
If so, do both of them work?
For each one that works, or if you don't get the choice....
Start - Run - type: msinfo32 (click OK or press Enter).
On the right, what does it say the Windows Directory is?
It's probably D:\Windows if you can only boot one XP installation.
If you can boot both, and both work, one would be C:\Windows, the other D:\Windows.
Is this a brand name system?
- did it still have it's brand name supplied original software installation on C before you installed Windows this time?
- did you decide to delete the contents of the second partition on the original hard drive and install Windows on it from a regular Windows CD, without deleting the data that was on the first partition?