Windows 7 will not start up after update

Good evening,

I cannot ge windows to boot up after an undate that was installed last night. I have an ASUS CG series desktop with windows 7 home premium. When i got home last night the computer was about to restart automatically to install the update so i told it to wait 4 hours. When i woke up this morning i had an error screen and was on the startup repair menu. When i run startup repair i get a message saying it could not be repaired and the following messages.

Startup Repair:

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- 21200957

Problem Signature 05- Auto Failure

Problem Signature 06- (ranges from 1-6, but always corresponds with the attempt #)

Problem Signature 07- CorruptAcl

I have tried to restore to an earlier date but the restore always fails. I cannon get the computer to start in safe mode (no option). I do not have a recovery disk to reformat. When i try to press f9 for recovery i get a different asus configuration screen and dont see any recovery options. Any help would be greatly appreciated.

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