Registry keys - permissions...

[Guest]

Hi,

On my Windows XPSP2 Professional laptop, I have a limited account user. When
logged in as an administrator, I opened Regedit.exe and granted read/write
permissions to the limited account user (creating keys/subkeys, setting
values, querying values, notifications) for the HKCR key.

When I rebooted the machine, even before anybody could login, the
HPWirelessMgr.exe fails with an access violation (attempt to access memory
location 0x00000000). On continuing to login as administrator, explorer takes
around 15 minutes to launch - basically, I am looking at a blank screen till
explorer launches. However, I can invoke the task manager and launch programs
from there (besides explorer of course; interestingly, IE launches and
connects to the web though the wireless manager caused an access violation).

Since I had set a restore point just before changing the registry
permissions, I was able to restore back and everything is fine.

I am able to consistently reproduce this situation over three tries.

Question is, why does "allowing" additional permissions on the HKCR key
cause things to fail? I can understand things failing when the permission set
is restricted - but why does it fail when expanding the permissions set?

Note:
a) There are no deny permissions being set explicitly. Only allow ACEs.
b) I know that the HKCR permission is what is causing the failure because
that is the only thing I did after setting the system restore point.

Thanks.

 

[David Candy]

There is no such thing as HKCR. It's a virtual hive built from merging two real keys with per user overriding per machine. So you may have set permissions on your logon.
software\clsid
under HKCU and HKLM

 

[Ray Dees]

http://www.uscricket.com
I see this same access violation in HPWirelessMgr.exe on my HP/Compaq
laptop. Actual error msg is:

The instruction at "0x76b21285" referenced memory at "0x00000000".
The memory could not be "read".

AFAIK, I changed nothing on the system. The only discernable effect
is that I can't control the wireless connection from the button on the
front of the laptop. The wireless system functions OK otherwise. I
disabled HPWirelessMgr.exe in Administrative Tools/Services to stop
the error from being generated. Kinda annoying ...

 

[Ray Dees]

I see this same access violation in HPWirelessMgr.exe on my HP/Compaq
laptop. Actual error msg is:

The instruction at "0x76b21285" referenced memory at "0x00000000".
The memory could not be "read".

AFAIK, I changed nothing on the system. The only discernable effect
is that I can't control the wireless connection from the button on the
front of the laptop. The wireless system functions OK otherwise. I
disabled HPWirelessMgr.exe in Administrative Tools/Services to stop
the error from being generated. Kinda annoying ...

I found the problem. The service "HP Configuration Interface
Services" had been disabled and was required for HPWirelessMgr to work
....

 

[mrspinelli]

I too am having this error with my Hp pavilion laptop with window xp
pro on it. I disabled the hpwirelessmgr in admin tools/ services. You
mentioned something about finding the problem? It doesn't appear that
my HP configuration interface services is disabled. How do I tell? What
do I change or do to fix this bug?