Thanks Andrew and Jay. Upon review, i'm not sure UPHCLEAN is going to help. See http://www.infofromdata.com/images/semainprob.jpg for a picture of my problem. This is a server that was fully loaded with users, and since had all the users logged off. A large number of processes are running (SEMAIN20, CSRSS, and WINLOGON) and you can see that CPU is being consumed, although nobody but me is currently logged in to the box. Ultimately, with users on, the box pegs at 100% CPU with a large CPU queue length and becomes unusable. Its almost as though some cleanup isn't happening at logoff.... Any thoughts/comments appreciated as always. - Bob Coffman -----Original Message----- From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Dogers Sent: Tuesday, January 17, 2006 9:55 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] Re: UPHCLEAN on NT 4 TSE Don't know about the current 1.5/6 version, but the older 1.2 (?) worked fine on our old TSE boxes before they were replaced. Andrew On 17/01/06, Robert K Coffman Jr - Info From Data <bcoffman@xxxxxxxxxxxxxxxx> wrote: Should the current UPHCLEAN work on NT 4 TSE? I have a problem I think UPHCLEAN might help with and I'd like to run it on these boxes, however in test I'm getting the following error after reboot: System Process - Driver Entry Point Not Found The C:\wtsrv\system32\Drivers\uphcleanhlp.sys device driver could not locate the entry point _except_handler3 in driver ntoskrnl.exe. Appears that UPHCLEAN would need to be compiled differently to work on this platform, from my investigation of that error. Any help appreciated. I just need to keep these boxes limping along for another couple of months! - Bob Coffman