I will have to agree with the re-install option. it really sucks that you will loose files... unless you go get another HDD to install the OS, then hook up your problem drive as a secondary HDD. you might be able to fix the files that way, or at least recover most of them. you might also want to invest in a UPS device, you'll have enough time to shut down your computer before the outage does it for you.
Happy Teching!