How to start windows after storm shut computer down

The thunderstorm may fried a component of urs. Check individual components for function on other machine

Try removing the battery on the mobo for a few seconds and put it back.

http://www.computerhope.com/issues/ch000239.htm

If this doesn't work try replacing it with a new identical battery.

Try entering in safe mode

Yeah, try safe mode as it seems the computer BIOS will post OK. Could be that some system files got corrupted as in power went off during writing to the HD. If it boots OK in safe mode, probably a driver issue, in which case put your Windows installation disc in the drive, boot from it, and try the "repair" option.

Yeah. Or you might have to format n' install window...

Go into Safe Mode.
Run System Restore and pick a date most recent. If that doesn't work, try the next date in line. It should be in Control Panel.

That fixed up not being able to log in after hard crash I had in the past.

Sounds like registry corruption. System restore should do the trick. Gets more complicated if you cant boot to safe mode. And you probably can't.

If not, try this:

http://www.ultimatebootcd.com/

You have to build it yourself, but its free. It includes a utility to use system restore from the boot cd. You can select restore dates and all.

Next step, get a decent UPS. APC has a good reputation; I think I have four or five of them now.