Q: 'Fatal error C0000034' on boot after Service Pack 1 for 64-bit systems install

Hi there,

I installed Windows 7 Service Pack 1 for 64-bit system on my laptop after it appeared on Windows Update. The install seemed to go alright, however, when I restarted the computer at the prompt of Windows Update, it gets as far as the Starting Windows screen, before throwing 'Fatal Error C0000034 applying update operation 282 of 114599 (_00000...)'

At this point, the startup sequence hangs and gos no further. I restarted again by switching off at the mains, and this time was prompted to run Startup Repair. I tried this, however the Startup Repair program hung (I left it for several hours with apparently no effect). I then proceeded to try the following things:

-Boot in Safe Mode
This led to the startup to hang at the 'Loaded: CLASSPNP.SYS', 'Please wait...' stage. Again, left for several hours, no progress.

- Run the recovery CD to restore from a System Restore point.
The program hung at the restoring system stage - again, left for several hours, nothing happens.

- On advice from google, I tried using the recovery console to run DISM /image:D:\ /cleanup-image /revertpendingactions (I should mention that the recovery CD seems to think my windows install is now at D rather than C)
This led to an error attached at

- Booting from last known good configuration
This just resulted in the same error as when I boot it normally

I haven't tried a complete system reinstall, as ideally I'd like to keep my files...

Any help would be greatly appreciated.



System Specs:

Windows Home Premium x64
Sony VAIO VPCEB2C5E Intel(R) Core(TM) i5 CPU M 520  @ 2.40GHz
Samsung HM321HI 500Gb HDD
ATI Radeon HD 5600 series graphics

Alsi uploaded CBS.log:
And poqexec.log:
Don't know if they'll be useful or not.



Okay, after much searching of Google, I found an answer that worked for me, my computer is now fixed without having to reinstall the OS. Solution courtesy of Aran, was found at

It essentially involves doing a manual system restore.

- Open the recovery console

- Change working directory to whatever the root folder of the Windows install is (might be D: or some other letter for some people):

cd /d C:\windows\system32\config

Rename the following files by typing the following:

ren default default.old
ren sam sam.old
ren security security.old
ren software software.old
ren system system.old

- Change the working directory:

cd regback

- Copy the files from this directory to the previous directory as follows:

copy default c:\windows\system32\config
copy sam c:\windows\system32\config
copy security c:\windows\system32\config
copy software c:\windows\system32\config
copy system c:\windows\system32\config

- Having done this, I restarted my computer, and it booted all the way with no errors. However, it seemed somewhat unstable, so I booted into Safe Mode and ran CHKDSK (chkdsk /B) and conducted a normal system restore to before the service pack install using the normal method. To fix remaining problems, I ran sfc /scannow. My computer now seems to be running as well as ever.

Hope this helps,


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Views: 66,127 Last updated: June 7, 2018 Applies to: