WINDOWS\CONFIG\SYSTEM -
This is your system registry. If it is corrupt...no windows will not load at all. This is usually a hard drive or memory problem. Basically the data in the registry is screwed. This can be cuased by hard drive or memory. Other things too, but that is the most likely cause.
Do a repair install as suggested (the second one...the first option for repair is via the recovery console, which you do not want).
The only problem you may run into is that your programs will have to be reinstalled and you will lose your user settings. No big deal. But your data will still be there. HOWEVER, sometimes you will not have admin rights to it since your newly installed OS will have a new user with a new SID. If you are using XP Pro, it's an easy task to get access to data again and I can tell you how to do it. If using XP Home, you will have to put the drive in another computer.
But...you still need to find out what is the root cause of this. Whether there is a damaged area on the hard drive or the memory is bad.
Overclocking could have caused this easily - but going back to default settings WILL NOT fix it if the data has already been corrupted because of the overclock. So your hardware may be fine, but your OC may have caused this error.
This is your system registry. If it is corrupt...no windows will not load at all. This is usually a hard drive or memory problem. Basically the data in the registry is screwed. This can be cuased by hard drive or memory. Other things too, but that is the most likely cause.
Do a repair install as suggested (the second one...the first option for repair is via the recovery console, which you do not want).
The only problem you may run into is that your programs will have to be reinstalled and you will lose your user settings. No big deal. But your data will still be there. HOWEVER, sometimes you will not have admin rights to it since your newly installed OS will have a new user with a new SID. If you are using XP Pro, it's an easy task to get access to data again and I can tell you how to do it. If using XP Home, you will have to put the drive in another computer.
But...you still need to find out what is the root cause of this. Whether there is a damaged area on the hard drive or the memory is bad.
Overclocking could have caused this easily - but going back to default settings WILL NOT fix it if the data has already been corrupted because of the overclock. So your hardware may be fine, but your OC may have caused this error.