What's up with my PC?

Question

I managed to get it working now (obviously), but during normal startup, it froze on the Windows XP screen. During a logged boot, it stopped during or after loading 'Mup.sys'.

I got it going by booting from a startup disc. My first guess was a problem with the MBR, but I figured that would stop it from even booting into a Windows loading screen.

To be on the safe side, on all occasions today, I have used the 'last known good', even though this did nothing before using the startup disc.

Note this is not a one-off. Not only did I have this problem first thing this morning, I have been out and had to boot from the CD again after I came back. Last night it was working fine, and, once booted, it still works fine.

Answer 1

Part of it is the fact it's a PC not a MAC....I wish I had a MAC (and I think my PC knows it)....I have problems with connecting to the internet and the only way I know to get it to work is the "last known settings that worked" I even sent my computer out to be worked on and I still have to do this.  

Answer 2

1 Run CHKDSK, it restores missing files.

2 Place your XP CD into the tray, then go to Start>Run and type "sfc /scannow" without the quotes. That'll replace any missing or corrupt system files