A patch is preventing the system from starting

I have a Lenovo G570 hasn't been able to start Windows. After I boot it, it goes through a screen that shows 'Windows Loading' and now will not start windows. When I press F8 ,on startup, it fails to boot into Windows 7. I get "Windows Error Recovery" with 2 options: Launch Startup Repair (recommended) and Start Windows Normally

When I choose Launch Setup Repair, it says it cannot repair this computer automatically. The Problem Details are:


"Startup Repair cannot repair cannot repair this computer automatically
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problemsignature:
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: 0
Problem signature 05: AutoFailover
Problem signature 06: 1
Problem signature 07: BadPatch
OS version: 6.1.7601.2.1.0.256.1
Locale ID : 1033

Also in Startup Repair diagnosis and repair log it showed me some tests performed and at the end gave me this message


Root cause found:
-------------------------
A patch is preventing the system from starting.

Repair action: System Restore
Result: Failed. Error code = 0x 1f
Time taken = 448097 ms

Repair action : System files integrity check and repair
Result: failed. Error code = 0x490
Time taken = 815433ms

In the system recover options i choose "System Restore" ........it ran through some files when i hit finish, laptop restarted came through the same problem earlier (screen showing 'Windows Loading' and is stuck there).