Win 7 - WUA & permission denied

[Aedan]

For some reason, when I'm trying to invoke the Windows Update Agent (WUA) to identify any missing patches, I'm getting a permission denied error.

Basically, I'm doing something like:

Set UpdateSession = CreateObject("Microsoft.Update.Session")
Set UpdateServiceManager = CreateObject("Microsoft.Update.ServiceManager")
Set UpdateService = UpdateServiceManager.AddScanPackageService("Offline Sync Service", CabFile)
Set UpdateSearcher = UpdateSession.CreateUpdateSearcher()

I get the permission denied at the AddScanPackageService point. Note that this isn't occurring across the network, as WUA can only handle local files. Any idea why this is happening?

[Gizmo]

Does WUA run normally if invoked using the Windows Update entry in the start menu?

[Aedan]

Good question, well asked. I don't know, but I'll endeavour to find out.

[Aedan]

The answer appears to be "no", Windows update comes back with an error, and MS suggest it's because there's a proxy. I do wonder if this means there's a WSUS server on the network though.

However, should that stop a local test happening? I have the CAB file locally.

[Gizmo]

Well, I wouldn't THINK it would stop a local test happening, but then again we don't truly know what's going on in WUA, so there's no telling. Maybe it tries to 'phone home' even when it's doing a local update?