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Re: UAC (.png & wmp) issues

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Old 01-30-2008
zachd [MSFT]
 

Posts: n/a
Re: UAC (.png & wmp) issues

OK, we have initial verification now on Jim's machine that this hack does
actually fix the "Windows Media Player not working under UAC" issue. Can
anyone else confirm?

Thus we now get into: who or what is locking down access to:
HKEY_CLASSES_ROOT\ Typelib\{6BF52A50-394A-11D3-B153-00C04F79FAA6}
? I'm assuming there is some common set of bad or removed software on
machines with this problem. As far as I'm aware, the permissions on this
key and subkeys are correct(?).

I would be very interested in knowing the installed and uninstalled set of
software of machines that encounter this problem to understand what might be
the actual culprit here.

--
Speaking for myself only.
See http://zachd.com/pss/pss.html for some helpful WMP info.
This posting is provided "AS IS" with no warranties, and confers no rights.
--

"zachd [MSFT]" <zachd@nomailplz.online.microsoft.com> wrote in message
news:Ow80WxtYIHA.1188@TK2MSFTNGP04.phx.gbl...
>
> Hm, OK - that seems like a hack designed to work around something denying
> read permissions to the HKEY_CLASSES_ROOT hive. I'm very displeased that
> something is causing this state and would love to know what is causing
> this condition.
>
> If you set the following registry keys:
> ======
> Windows Registry Editor Version 5.00
>
> [HKEY_CURRENT_USER\Software\Classes\Typelib\{6BF52A 50-394A-11D3-B153-00C04F79FAA6}\1.0]
> @="Windows Media Player"
>
> [HKEY_CURRENT_USER\Software\Classes\Typelib\{6BF52A 50-394A-11D3-B153-00C04F79FAA6}\1.0\0\win32]
> @=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00 ,52,00,6f,00,6f,00,74,00,25,\
>
> 00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00 ,32,00,5c,00,77,00,6d,00,\
> 70,00,2e,00,64,00,6c,00,6c,00,00,00
>
> [HKEY_CURRENT_USER\Software\Classes\Typelib\{6BF52A 50-394A-11D3-B153-00C04F79FAA6}\1.0\FLAGS]
> @="0"
> ===
> , can you then access Windows Media Player normally?
>
> Given the data on the PNG issue, this would potentially tie together:
> something is causing HKCR reads to fail for the UAC'd user, and the
> current newsgroup solutions are to simply hack around this failure.
>
> My registry suggestion above is rather a hack - it's just to determine if
> I'm correct in my diagnosis so far. But if I'm right, it should actually
> work. I do not recommend anyone set this on a machine that does *not*
> have this problem, as setting HKCU\Software\Classes setting is generally a
> very very bad idea, and this is no exception.
>
> -Zach
> --
> Speaking for myself only.
> See http://zachd.com/pss/pss.html for some helpful WMP info.
> This posting is provided "AS IS" with no warranties, and confers no
> rights.
> --
> "JK of Seattle" <JKofSeattle@discussions.microsoft.com> wrote in message
> news:C014C1B8-67B7-428C-8670-08ADEADB4A3E@microsoft.com...
>> WEZ:
>>
>> Thank-You for the insight to the problem I had with png images not
>> displaying in IE7. This problem was also causing the stack-overflow
>> problem
>> in google maps.
>>
>> I too adjusted your entries for HKCU to mirror my HKCR\MIME registry
>> items.
>> Similar to what JSandPC did.
>>
>> Interestingly all the HKCR\MIME entries were mirrored in
>> HKCU\Software\Classes\VirtualStore but none of the entries had values set
>> :[
>>
>> If you would like to compare my registry items above to yours they are
>> located at:
>>
>> http://www.yourartisans.com/png/HKCR-MIME.reg
>> http://www.yourartisans.com/png/HKCU...rtualStore.reg
>>
>> Not sure what place the virtual store plays in the system.
>>
>> My updated version of your registry is located at:
>>
>> http://www.yourartisans.com/png/My-p...-ie7-vista.reg
>>
>> THANK-YOU Wez !! -- THANK-YOU Wez !! -- THANK-YOU Wez !!
>>
>> I'm sure this is only a bandaid for just png images, since all of the
>> HKCR\MIME entries are not populated/mirrored in HKCU. But HAY! png's
>> display,
>> even in my outlook junk mail )
>>
>> JK
>>
>>
>> "Wez" wrote:
>>
>>> Hey everyone. I was shocked to find that so many other people were
>>> having the same problems as me.
>>>
>>> Enviroment
>>> ---------
>>> Windows Vista
>>> IE7
>>> 2GB of RAM
>>> Intel Core Duo 2.8GHz
>>>
>>> My Problems
>>> ---------
>>> Can't display PNG images
>>> Can't display WMP videos
>>> Can't display SWF animations
>>>
>>> I have no idea what caused this. One day IE7 jsut stopped working
>>> correctly. The*only* major thing I did prior to this was install and
>>> then un-install quicktime (iTunes).
>>>
>>> My Solution
>>> ---------
>>> I tried dozens of .reg fixes with no luck. I tried clearing cache, re-
>>> installing quicktime, repairing IE7. Well... you get the idea.
>>> Somebody told me to run IE as an Administrator. I was supprised that
>>> my functionality was restored. So I decided to digg deeper. And I ran
>>> two Process Monitors which took a snapshot of my memory both with IE
>>> running in normal and elevated mode. What I found was, when you run IE
>>> in elevated mode, it reads the prefs from HKCR.. NOT HKCU. I then
>>> filtered both capture logs to check for NAME NOT FOUND against
>>> anything with "png" in it's path. Sure enough, everything that refered
>>> to "png" within the HKCU was gone. Not locked out with bad
>>> permissions, but completely gone.
>>>
>>> So I simple exported all the .png pngfile keys from the ROOT, into the
>>> CURRENT USER. Hey presto, I now have PNG functionality restored in my
>>> un-elevated IE7.
>>>
>>> FIX: http://www.wezcrozier.com/png-fix-ie7-vista.zip
>>>
>>> * I can't guarantee this will work. Other .reg fixes seem to
>>> concentrate in fixing the png keys at the ROOT level. Which already
>>> present for me, because I could see PNG's when IE ran with elevated
>>> permissions.
>>>
>>> * Also, the same thing was screwing up my swf and wmv playback!
>>>
>>> Let me know if this helps you guys out.
>>>
>>> Cheers,
>>>
>>> Wez

>
>



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