STOP 0X0000001E error

This morning I installed the Security Rollup Package on a Dell Laptop that is running SP6a. When I rebooted I got the BSOD and the following error

“STOP 0X0000001E (0X810A985, 0X00000005, 0X0000001, 0X0000004)KMODE_EXCEPTION_NOT_HANDLED)XXX ADDRESS 8010a975 HAS BASE AT 80100000 – NTOSKRNL.EXE.”

I tried rebooting numerous times and get as far as the login screen after it has you hit CTRL, ALT, DEL but when I enter my login name and password and hit enter I get the blue screen of death.Please help!!!! Thanks.