Computer wont boot

[anc900]

I've had a problem with vista and tried to reinstall my XP system, during install i had the message that some files were missing.
Now my computer wont boot, it starts to but during the 1st page ie as it lists and checks the hardware, I get a 0078 code in the bottom right hand corner.
I have tried resetting the cmos but that doesn't seem to work, have borrowed a tower from a friend and its so slow!!
Need help please!

[reddevilggg]

Try replugging all your drive cables and reseating all your cards. If you've got some compressed air then give the inside a clean while your in there. Take the battery out of the BIOS while you do this.

[patio]

How exactly did you do this ? ?
Vista normally will block an XP install so describe in detail what method you used.

[anc900]

My Vista wouldn't activate and then wouldn't allow me to log in so maybe this is why it let me install XP?
I just put my installation disk in and installed from this, it was going fine untill the missing files problem.
I will try the taking out all the cards etc and see if that works

Thanks for the help

[BC_Programmer]

Vista normally will block an XP install

Only when you run XP setup from within windows. No way can Vista block something when it isn't loaded, IE: when booting from XP CD.