There are some people that are having issues with the latest Service Pack for Windows 7 and Server 2008R2. You may get the error: !! 0xc0000034 !! 142/53007 (_0000000000000000.cdf-ms), even upon a restart. Microsoft has come up with a fix to uninstall the Service Pack:

Option 1 (Win7 client only): Use a system restore point to recover the system

This one is pretty self explanatory. Boot your machine into WinRE and pick a restore point before the service pack was installed. This should get you back up and running.

This doesn’t work on server

Option 2 (Win7 client and 2008 R2 server): Delete the poqexec entry

Boot into WinRE and choose a command prompt then run the following commands and restart the computer:

Reg load HKLMBaseSystem C:WindowsSystem32configSYSTEM

Reg Delete "HKLMBaseSystemCurrentControlSetControlSession Manager" /v SetupExecute

Reg add "HKLMBaseSystemCurrentControlSetControlSession Manager" /v SetupExecute /t REG_MULTI_SZ

Reg unload HKLMBaseSystem

If you’re more graphically inclined, you can use this method:

Boot into WinRE

Open Registry Editor using regedit.exe

Now you will have the WinRE registry loaded so you need to load the “ System ” hive

To do that : Highlight HKLM then Click on File > Load Hive > Browse to C:windowssystem32config (assuming C: being the system drive )

Name the Hive as TEST

Browse to HKLMTESTselect and check the value for “ Current “

Assuming the value as (1) browse to HKLMTESTControlSet001ControlSessionManager

Locate and double click the key “SetupExecute ” at the right panel

Delete any value inside the key and click OK

Highlight TEST and then Click on File > Unload hive

Type exit at cmd

Reboot the machine and choose to start the machine normally