This is in XP but should be relevant.

On one of my users the default mail client cannot be set. I'm using
Thunderbird and every time it starts it asks if it should be the
default. Saying yes, and clicking the don't ask again, appears to set
it but going into Thunderbird options the default mail check box is
unchecked. Checking, exiting and reopening options shows it to be
unchecked.

The registry entry HKEY_CLASSES_ROOT/mailto permissions are corrupted.
Originally there was no subentries under mailto and the permissions were
set for another user. Changing mailto to the current user showed the
subentries but I still cannot change any of them nor can i give
ownership to any of them. I cannot delete the mailto entry either in an
attempt to reconstruct the entries from another user. All users on this
system have admin permissions.

I can still use mail but this is annoying and not right as far as the
ability to edit the registry.

Any pointers?

--

Kirk DeHaan

'Captain' Kirk DeHaan said the following on 1/31/2007 1:31 PM:
> This is in XP but should be relevant.
>
> On one of my users the default mail client cannot be set. I'm using
> Thunderbird and every time it starts it asks if it should be the
> default. Saying yes, and clicking the don't ask again, appears to set
> it but going into Thunderbird options the default mail check box is
> unchecked. Checking, exiting and reopening options shows it to be
> unchecked.
>
> The registry entry HKEY_CLASSES_ROOT/mailto permissions are corrupted.
> Originally there was no subentries under mailto and the permissions were
> set for another user. Changing mailto to the current user showed the
> subentries but I still cannot change any of them nor can i give
> ownership to any of them. I cannot delete the mailto entry either in an
> attempt to reconstruct the entries from another user. All users on this
> system have admin permissions.
>
> I can still use mail but this is annoying and not right as far as the
> ability to edit the registry.
>
> Any pointers?
>

Another strange effect...

I did manage to get the mailto subtree to appear by changing
permissions. I honestly am not sure what did the change. After
changing the permissions I still did not have access. After trying to
make a NEW key the others appeared and then I had access. I repeated
this process until the whole subtree was visible and Thunderbird was now
the default mail client for THAT user. I logged out and back in as a
user that WAS functioning properly and Thunderbird now asks to be the
default mail client. However the settings will not stay. Same issue as
the other user. Why is one affecting the other? Aren't they separate
registry files? There appears to be something in common here but what?


--

Kirk DeHaan

I'd get in touch with the application tech support.

--

Regards,

Dave Patrick ....Please no email replies - reply in newsgroup.
Microsoft Certified Professional
Microsoft MVP [Windows]
http://www.microsoft.com/protect

"'Captain' Kirk DeHaan" wrote:
> 'Captain' Kirk DeHaan said the following on 1/31/2007 1:31 PM:
>> This is in XP but should be relevant.
>>
>> On one of my users the default mail client cannot be set. I'm using
>> Thunderbird and every time it starts it asks if it should be the default.
>> Saying yes, and clicking the don't ask again, appears to set it but going
>> into Thunderbird options the default mail check box is unchecked.
>> Checking, exiting and reopening options shows it to be unchecked.
>>
>> The registry entry HKEY_CLASSES_ROOT/mailto permissions are corrupted.
>> Originally there was no subentries under mailto and the permissions were
>> set for another user. Changing mailto to the current user showed the
>> subentries but I still cannot change any of them nor can i give ownership
>> to any of them. I cannot delete the mailto entry either in an attempt to
>> reconstruct the entries from another user. All users on this system have
>> admin permissions.
>>
>> I can still use mail but this is annoying and not right as far as the
>> ability to edit the registry.
>>
>> Any pointers?
>>
>
> Another strange effect...
>
> I did manage to get the mailto subtree to appear by changing permissions.
> I honestly am not sure what did the change. After changing the
> permissions I still did not have access. After trying to make a NEW key
> the others appeared and then I had access. I repeated this process until
> the whole subtree was visible and Thunderbird was now the default mail
> client for THAT user. I logged out and back in as a user that WAS
> functioning properly and Thunderbird now asks to be the default mail
> client. However the settings will not stay. Same issue as the other
> user. Why is one affecting the other? Aren't they separate registry
> files? There appears to be something in common here but what?
>
>
> --
>
> Kirk DeHaan