Ok, soooooo....my lap top fired up. It gave me a message that a disc needed to be checked, and that Windows recommends I allow it to...so finally I let the check run its length (I had aborted when it seemed to be endless and useless) and what do you know...the check completed and I was able to log in. However, still only totally useful in safe mode. Regular mode still freezes up.
Virus?
Yeah, could be. It also could be "OS Installation Rot" which mainly happens with Microsoft OS'es, and if that's it, reinstalling Windows will fix it.
Or, again, it could be a failing drive, as already mentioned. Run scandisk (if you can go to the Task Manager and figure out what other programs to stop that write to disk, they make scandisk restart, and after ten restarts it gives up).
The best thing would be get another hard drive (
http://pricewatch.com), but I don't know how hard it is to replace a drive in a laptop - a computer store will charge some "reasonable fee" (I'm afraid to look) to do it, and install Windows on it. Then you can use an adapter for USB to access your old drive as an external drive (turn autorun off first), so you can check it with scandisk and other drive utilities, scan for viruses, then if it's all fixed up you can copy all your files onto your new drive. But all that takes some computer-fu or whatever it's called. But doing that, it no longer depends on a questionable drive to boot up the computer.
Computers are horribly, hideously complex machines.
Rube Goldberg is lucky he never owned one.