[THIN] Re: CPU - Explorer and Winlogon

 Mark -   >does this happen to all of your servers ? It definitely seems to
occur for all my published desktop servers.  I've duplicated the high
processor usage (in varying degrees) on all my servers that I've looked at. 
I'm not sure if the hanging or sluggishness is an issue with all of them,
however. 
>does this only happen to specific clients on specific
>servers ? Just the thin client users that connect to a published desktop. 
>have you done any sort of S/W upgrade on the servers ? Looking back through
my notes, I can't find anything that was made that would have affected
everything, except for two things.  One was that I upgraded the firmware and
client version on the NCD thin clients.  Since I just managed to experience
the problem on a downgraded thin client (while typing this email), that
wouldn't be the problem.  The other was that we upgraded to Norton Antivirus
Corporate 7.61.  I'm now wondering if that could be the cause.  I think I'll
uninstall that this evening off of one server and test that out. 
>is the login script still running during this period
>of High CPU usage ? Yes, but the high CPU continues even when the login
script completes.  Here's what's happens (I can describe it pretty well
sinceit's happening again on this client): User powers on their client and
eventually gets sent to the login screen of one of the servers.  Even this
causes a spike in CPU with Winlogon using about 30-50%.  User logins in. 
Winlogon maxes out the CPU (seems to use all available).  Context
switches/sec go from their average (right now 12,000) to 60,000 with a spike
over 100,000.  Once explorer starts for the user, that begins to take up CPU
(30-40%), though not as bad as the winlogon.  The user could just sit at
their desktop and not move and their explorer.exe will still be using about
20% processor for about 20 seconds or so.  The hangs for the users are felt
during the winlogon part and slightly during the explorer.exe (depending on
how busy the server is at the time).   Yesterday I was looking more at the
explorer process part, but after working on a thin client this morning, I
think I'll re-examine the winlogon.  That seems to be the kicker.  It will
just grab every bit of processor available.   Thanks for the response, by
theway.   llater, Tony


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