|Can you enter the BIOS (setup) screens and stay in there with stability?|
The surge could have damaged hardware or just corrupted your Windows installation. There are Live versions of Linux that run off a CDR. Download and burn one of them to CDR. If your computer can run OK that way then your problem is just a corrupted installation of Windows. You can perform a repair or if you maintain backup images you could apply one of them.
Below is a link to Puppy Linux. Also possible to install some versions of Linux to a flash drive, if your BIOS allows booting from a USB flash drive.