Have continuously failed to install KB979910 and KB982536 with error message 800736B2. Have tried Manual Install, Install with Clean Boot, reinstallation of NET framework 3.5 and even reinstalled Windows Update Distribution Folder with directions from MS tech. No Luck. Did a SFC /SCANNOW which stopped at 46% verification: from the log it appears to be autochk.exe and the "source file in store is also corrupted" so it can't be fixed automatically.

If the installation problems are related to the scan results how do I manually fix the autochk issue?

If it's a separate issue any suggestions?

I run Trend antivirus and Malwarebytes antimalware with clean scans. My system runs 32bit Vista Home Premium SP2.

Thanks in advance for any help.

Thanks for your reply Tom. Tried both suggestions--still can't successfully update. Tried both default and aggressive Window update component resets--no good. Tried multiple SFC /SCANNOW--got stop at same location in all three cases (at autochk.exe, according to log)
I tried SFC/verifyonly which went all the way through and indicated multiple integrity violations. I'm no expert on interperting the log but did see indications of problems with both KB979910 and the windows update service specifically.

Is it possible I need to fix the autochk.exe issue first so that SFC can get to repair the later integrity issues with windows update?

Any suggestions appreciated

Thanks Tom. I only have the original VISTA installation disc that came with my Dell (which is mirrored on my D: partition). Since I'm at SP2 I can't do a repair install with the older, original OS. Think I'm stuck with doing a clean install and then downloading about 2 years worth of upgrades and reinstalling app's...yikes

Hello,

If you really will not do a clean install at this time, I will give a try at fixing this issue, though I can guarantee nothing.

Can you please run SFC one more time and upload the latest log? We have out hands tied a bit if we cannot see the log first hand. Please follow the tutorial here: System Files - SFC Command following the instructions in the top yellow box, then upload or paste inline the sfcdetails.txt file created on your Desktop. Thanks!

800736B2 ERROR_SXS_INVALID_ACTCTXDATA_FORMAT
The application binding data format is invalid.

There are several things to do. Temporarily disable all real time protection (anti-virus program) etc. and try again. This is regularly the cause for this error, in particular real time cookie scanning software.

I know that you have already done some of this, but please redo it. Thanks!

Reset the WU components: How do I reset Windows Update components?

Reset the WU modules: Repair & Fix Windows Updates with Fix WU Utility | The Windows Club

Run the System Update Readiness Tool (about an hour to run, or less) Description of the System Update Readiness Tool for Windows Vista, for Windows Server 2008, for Windows 7, and for Windows Server 2008 R2

Zip up the contents of the C:\Windows\Logs folder (right click on folder > Send to > Compressed (zip) archive, and upload it to your next post.

Go to Start>>Search>>services.msc
and check below services exist, have correct settings and are working

BITS :Automatic(Delayed),started

Windows Update : Automatic(Delayed),started

Windows Modules Installer:Manual

This is a quote from Flavius, please follow it and report back.

Thanks!

Thanks Niemiro. I'm attaching the sfcdetails file from my latest scan. I will report back after following the rest of your response with the zipped log folder. Much appreciated.

Re hi
Reset the WU components and modules and ran the readiness tool. The three services were ok. Closed Anti virus completely and tried both automatic and manual installs--no luck, same error as before and no install. I couldn't get the whole compressed log folder to upload. So I left out the CBS_persist_log and managed to get the rest of the CBS folder and DPX folder on here. Hope this is ok. Appreciate your's and Tom's help.
Bob