To make a repair disc, just find another computer with Windows 7 and either 32 or 64 bit version matching yours. Then on that PC go to Start -> Control Panel -> Backup and Restore -> Create a system repair disc. Insert a blank CD-R and in about 3 minutes time you'll have a disc you can boot from on your damaged PC. That could be all you'll need if you're lucky. It just depends on how badly your system is corrupted from that powering off.
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When you've gotten your system back like you want it, I urge you to get yourself an external hard drive and a good 3rd party backup program. You can set it up to do everything automagically at the time and frequency of your choice. 1 TB external hard drives are about $50 these days and a really good FREE backup program is the Easeus Todo Backup Free. That can save you a lot of time and frustration the next time something like this happens. Sooner or later it happens to all computers for one reason or another.
Good luck.