IRQL_GT_ZERO_AT_SYSTEM_SERVICE since Windows update

I'm getting this STOP error after I updated Windows 7 using Windows Update. I made a system restore in order to try to solve temporarily. I don't want to stay outdated and exposed, so I searched and found this page about the error, IRQL GT ZERO AT SYSTEM SERVICE 0x0000004a.

The problem is that it does not help me understand what the real problem is. For now I want to install all updates since 5 January 2013 except the problematic one, but the combinations are 20!(factorial) which is an insane amount.

Do you know which recent Windows 7 Update may have caused this?

Specs

• OS: Windows 6.1 build 6001 (SP1) Home edition

• Technical details of the STOP error

  Bugcheck: 0x0000004a (0x00000000746e2e09, 0x0000000000000002, 0x0000000000000000, 0xfffff8800c3a2c60)  
  Report ID: 011713-66674-01