We are running a Windows NT 4.0 Terminal Server which is patched with SP 6A. On top of this machine Citrix Metaframe 1.8 is installed with SP4 (build 663).
Everytime a user tries to logon, the authentication is almost immediate, however for some reason after the desktop is shown they have to wait for almost 1.5 minutes before their hourglass disappears. The system itself is running on two (old 450 Mhz Xeon processsors). 50 percent of the CPU is being used because explorer.exe steals that processor time for those 1.5 minutes.
I have already tried to repatch the OS with SP6a and the Citrix Metaframe with SP4 but this did not solve the problem. Any pointers or hints what might be causing this?
Looking forward to your replies.