That’s the quickest way to have a computer die.
Try the following: while your computer is booting, press the F8 key to enter safe mode.
If the computer enters safe mode and things look fairly “OK” (no hiccups), then start-shutdown-restart. However if your computer still acts weird in safe mode, then you’ll need to start burning cd’s of whatever you cannot afford to lose.
Btw, get a UPS. Buy a named brand like APC.