I've moved this to our VSE area. Hopefully someone can help you soon.
Since you didn't mention it in your post, are you running the latest Service Pack 2 on all machines?
Tried excluding ntuser.pol from scanning and changing the settings in "Access Protection"?
In addition, if those machines are acting as servers or on a domain, there is a Microsoft article about such situations:
Hope this helps.
close but not it. no hotfix for xp 64 bit. and the errors are not accessing the pol files from the domain controllers its the local user pol file on the c: drive, also not limited to the users pol. file also experiances issues with installing and unistalling applications like MS office 2003 SP3
users experiance many time though out the day.
Source: Application Hang
Event ID: 1002
Event Time: 12/1/2009 1:20:28 PM
Hanging application OUTLOOK.EXE, version 11.0.8206.0, hang module hungapp, version 0.0.0.0, hang address 0x00000000.
OS is Windows v5.2; Service Pack 2
Still no mention of whether you're using SP2/Patch #2 on VirusScan 8.7i?? (Sorry if I wasn't clear about that.) And still no mention of tinkering with the "Access Protections" settings.. Most such issues are with the protections used by the "Access Protections" panel.. First, simply disable "Access Protection" and see if that fixes the issue. If it does, then you can find a specific setting that's causing the issue. Frequently, it's a problem with a specific "Common Standard Protection" item. For example, the knowledgebase article below refers to one such issu on 64 bit systems. It's not the same issue as yours but the same principal applies.:
As to the Outlook hang, have you tried disabling the "Exchange Scan" option in the Outlook "Add-In Manager"?
Hope this helps.
Just an FYI, Microsoft has a list of files and folders you night want to think about excluding from VSE, the .pol files being part of their list. I had some issues in the past and after adding these exclusions, I have not had a reoccurence of those problems. Here is the KB article if you would like to take a look and give them a try.