Hiya guys'n'dolls...

I was wondering if there are any Mac users here that might be able to help with an issue.

I have a buddy that just bought/switched to a Mac - the "all-in-one" type, where it's just a monitor. He just recently has an issue whereby he can not login. The boot-up gets to the login screen, pauses for a second, then dumps to a blue screen, then back to the login screen after a short while. Lather, rinse, repeat forever.
He's tried re-installing the OS from his disc but it gets part way and says it can't load a specific driver or something for some reason, then fails.

Anyone else ever heard of or have this problem?

Please help if you think you can. Any help is greatly appreciated.

Thanks folks.

Mark Larmand...