windows 7 not booting, showing setup repair again and again

due to a sudden power cut, my pc shut down. on restarting windows it doesn't boot instead it's showing setup repair, and after repair completes, and restarts, it again shows the same setup thing. this is happening again and again. any help.

Sounds as if the sudden power stoppage might have messed up the boot dll files. You could try repair using the Windows 7 install disc. That will happen with hard drives sometimes, there's really not much that may be done regarding that.

More than likely you'll have to due a clean install though.

i dont want to reinstall it. i get only 15kbps and if i reinstall it then i ll have to reinstall all those updates again. with my speed it ll be huge pain in ass. that's why i m asking is there anything that i can do. here are the reports of problems :
problem event name : startup repair offline
problem signature 01 : 6.1.7600.16385
problem signature 02 : 6.1.7600.16385
problem signature 03 : unknown
problem signature 04 : 21200441
problem signature 05 : External media
problem signature 06 : 3
problem signature 07 : Corrupt file
o.s. version : 6.1.7600.2.0.0.256.1
locale ID : 1033


so if anyone can help me through it, then please help.

Like Nibs said, boot to the W7 DVD and run repair. I've read something about maybe having to run the repair up to 3 times.