Windows won't boot after update

At least, that's what I think. When I start the pc, windows will boot to the splash screen, hang hang for a minute and then reboot. Just before it does, I can hear the hdd spinning down.

Safe mode won't work, system restore won't work, loading last know configuration and system restore won't work.

Any suggestions?

I think this happend after a windows update. After I tried "repair you computer" I got a number of errors, the first 2 are 6.1.7600.16385. This is a windows update I think

Did you try repair options from booted external media - e.g. cd/dvd?

No not yet because obviously I can't find the dvd...Should I try a chkdsk from the dvd?

dunno but i had same problem I held down f8 got repair windows and on top repairing windows I system restored (my safe mode work) it took like 12 attempts get back windows and soon updated again windows went down... now im not shutting down because dam update is lurking waiting to destory my poor labtop again *cry*

For future reference keeping a recent system image (or more) would enable you to get out of unforeseen messes. The problem could be anything from an installation issue like yours or virus problem to a HDD failure.

Work through these steps for Troubleshooting Windows 7 Failure to Boot - Windows 7 Forums

Thanks guys, I'll give it a go

After running sfc /scannow /offbootdir=c:\ /offwindir=f:\windows it says it found some damaged files but could't repair them all.