Windows 7 Won't Start, Repair Or Restore

Problem: This morning I had a brief 1 second power outage while I was using my computer which forced it to shutdown. It just stood there shutting down for about 15 minutes when i decided to click force shutdown. After restarting, computer ran checkdisk and startuip repair because windows was not loading.

Issues; I ran chkdsk a couple times, lots of bad sectors./index files repairing recovering, but it ends up hanging at stage 4 at a certain spot. I left it running at that spot for over 5 hours and just stood there(I went to sleep and woke up at same spot). I booted with windows 7 cd and tried startup repair, the first 3 times it said it couldnt repair. It only showed 2 restore points available and both gave error messages saying they couldnt load. I ran a checkdsk /r again and was fixing a lot of stuff and hung at same spot again. Tried another startup repair, this time it said it worked but still the same problem, windows isnt loading. However, I am able to get to the login screen now after waiting about 10 minutes at the windows logo however my kieyboard/mouse functionaility seems to be gone so i cant even type my password to login at that point. I ran a diagnostic in the boot menu, when checking the harddrive it gave me an error. Ive tried booting to every option available, safe mode, safe mode with networking, safe mode with command prompt etc, nothing works. It brings me to logon screen after a long time but keyboard./mouse dont work at that point. Now, like i said i dont want to reformat my computer and lose all my files. My keyboard/mouse work with the windows 7 bootup cd doing those menus but not when it gets to logon screen booting the normal way. I was thinking of buying an external drive and installing windows on there and booting from there but im not sure if my computer would recognize it since it wont recognize my keyboard and mouse at login screen.