Having some weird bits happening to my computer all of a sudden when booting up.

I did a defrag
I did a Check Disk on all the drives, all seem healthy and not in need of repair.

So not sure what else to try.

The blue screens are basically one of those "Oops, Windows didn't start right" then it runs the check disk thing and then reboots. Sometimes it goes to the logon screen but now here and there I'm getting the Repair screen. I just don't have the time right now to do that sort of thing, esp sometimes it leaves things in worse shape (like programs run funny).

If anyone has any ideas I might try or things to investigate I'd really love to get your help and feedback.