[THIN] Re: usrclass.dat not giving up the ghost - taking out servers, driving me nuts

  • From: "Rick Mack" <ulrich.mack@xxxxxxxxx>
  • To: thin@xxxxxxxxxxxxx
  • Date: Thu, 15 May 2008 20:31:56 +1000

Hi,

This is sad, replying to myself. However there's a free utility just
released that might do the trick for you.

Check out
http://www.tescitrixoupas.net/index.php/2008/xenapp-server-maintenance-oorium-sessions-cleaner/

regards,

Rick

-- 
Ulrich Mack
Quest Software
Provision Networks Division



On 5/15/08, Rick Mack <ulrich.mack@xxxxxxxxx> wrote:
>
> Hi Andrew,
>
> Sounds pretty good to me :-)
>
> usrclass.dat is the per-user file extension part of the user's profile or
> what you see in the registry under HKCU\Software\Classes. Under HKEY_USERS,
> you'll see a bunch of %usersid% and %usersid%_classes keys and
> %user%_classes corresponds to the user's HKCU\Software\Classes hive.
>
> The classic symptom is that when you run up regedit, you'll see ophaned
> %usersid%_classes keys with no corresponding %usersid% key. Depending on the
> scenario, which is often just a timing issue because the o.s and uphclean
> gave up unloading the hive, you can select the orphaned hive and select file
> > unload hive from the toolbar and voila it's gone. You should then be able
> to delete the profile folder without a reboot.
>
> You see, most times it's not the file that's being held open, it's a
> registry hive that hasn't been unloaded. When you can't unload the
> HKCU\Software\Classes registry hive, and it is a separate hive, then you'll
> end up with an open usrclass.dat file under %userprofile%local
> settings\application data\microsoft\windows.
>
> Anyway, as to why this happens, there are any number of causes from over
> exuberant virus checkers to Microsoft security hotfixes that have broken
> part of csrss yet again. Even UPHClean will give up eventually so it doesn't
> actually handle the orphaned usrclass hives either.
>
> So your real problem is how to programmatically unload orphaned usrclass
> hives and get rid of the folders (and orphaned usrclass.dat) file and
> profilelist entries before the next user logon when you get
> multiple %username%.001 etc profiles piling up.
>
> I haven't actually tried it, but the script at
> http://sogeeky.blogspot.com/2007/03/vbscript-unload-non-active-user-hives.html
>  may
> handle the registry hive unload issue for you. The profile cleanup after the
> hive unload should be easy with the bomprof utility from
> http://www.ctrl-alt-del.com.au/CAD_TSUtils.htm. Run tyhe 2 together as an
> end of day batch job and things should be tolerable.
>
> regards,
>
> Rick
>
> --
> Ulrich Mack
> Quest Software
> Provision Networks Division
>
> On 5/15/08, Andrew Wood <andrew.wood@xxxxxxxxxxxxxxxx> wrote:
>>
>>  I'm going to give it another couple of days, then everyone is getting a
>> pencil and a pack of post-it notes.
>>
>>
>>
>

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