Build 615 Multiple Profiles Bug and Fix (a.k.a. Error 101)

[Kevan Brown]

Apparently when the build 615 installer upgrades an
earlier build of Microsoft AntiSpyware, it is screwing
with the permissions setting on the
HKEY_LOCAL_MACHINE\SOFTWARE\Classes registry key and in
turn setting the permissions on all of the GIANT
AntiSpyware COM registry keys so that only the user who
installed the upgrade can access them. This causes the
program to generate the following error message when a
different user logs into the system: "Unexpected Error;
Quitting". Eventually this produces an "Error 101" when
you try to launch the program manually.

The resolution is to go explicitly grant the built-in
SYSTEM account Full Control on the
HKEY_LOCAL_MACHINE\SOFTWARE\Classes registry key. This
somehow then resets it so that it picks up the permissions
it should already be inheriting, and also resets the GIANT
AntiSpyware COM registry keys to the permissions they
should already be inheriting.

I haven't seen this problem on any machines where build
615 was installed fresh; without upgrading from a previous
build.

I found that this problem also affected another Microsoft
installer used by Microsoft Virtual Server 2005. The same
fix resolved that problem as well.

Kevan Brown

 

[Lappen]

I only wanted to say that I tested this, I added System and gave it full
access and all the normal permissions reappeared, after that I removed
everyone restarted the computer and it works again on the other admin users
that it wouldn't before! So a bit THANK YOU Kevan!



//Lappen

 

[Guest]

The above answers work, but for a novice it might be a bit difficult to get:
First you have to run regedit;
go to HKEY_LOCAL_MACHINE\SOFTWARE\Classes registry key
Right Click and go to permissions
Remove "everyone"
Add "SYSTEM" and give full access rights
Close regedit.
Reboot the system
Remove MS Antispyware
run CCleaner
reboot
reinstall MS Antispyware
Now it should work for all users

Thanks to the hint of Kevan Brown