I have been testing a Powershell script to monitor the last install datetime of downloaded patches from WSUS on all my machines in the domain.
I found the path from http://technet.microsoft.com/en-us/magazine/gg153542.aspx
The paths which I use are: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\Results\Detect\
In all the paths above, there is a variable called LastSuccessTime which I use.
When I ran my script against all the machines, I cannot get anything from: Windows 2008 R2 64-bit Windows 2003 Enterprise 64-bit Windows XP 64-bit Windows Vista 64-bit
However, I was also get the registy info from Windows 7 64-bit or Windows 2003 32-bit.
The really weird things are:
1) I was able to use regedit to manually remote access those 64-bit machines and confirm that the path was valid and there is a LastSuccessTime field there. So, I can confirm that the same path applies to all OSes.
2) On those 64-bit machines, I was able to fetch other registry entries without any problem.
3) I reran the script and this time shortening the path to see where the access was aborted. It is in here
where the access was denied.
Could there be a restriction on reading the ...\WindowsUpdate registry folder while WSUS is active for 64-bit machines?