windows 7 startup repair loop

Hey looking for some help and think this could be the right section. I am running windows 7 on a Asus k50in laptop but on going to start it up today windows would not load up, I had to force a restart at which point it ran a system scan and rebooted at which point I ran a system repair which advised it had completed a repair but restarted and kicked in again, it again tried a repair then restarted. At this point it advised it could not repair automatically, and on each restart I do it just kicks straight in to system repair. The details it gives for the problem even are as follows: event name -startuprepairoffline, signature 01 -6.1.7600.16385, signature 02 -6.1.7600.16385, signature 03 - unknown, signature 04 -21200980, signature 05 -autofailover, signature 06 - 10, signature 07 -corruptregistry, os version 6.1.7600.2.0.0.256.1, locale is - 1033. Any instructions greatly appreciated. Thank you!

 

Thanks for reply, have given that a go but to no change and on restart following its gone straight back in to the same loop over again, anything I could try next!

 

I have found an option via f9 at startup, windows setup ems enabled, which then takes me thrioigh to Asus preload wizard, before I run this I wanted to check whether doing so will clear the data from my d drive or just c drive, if so how would i back up both drives? Or can i only do so manually. Thanks again