I have been working for quite some time to resolve an issue on my Thinkpad T22 with W2kPRO SP4. I got the OS from this site and went to windows2000.tk to get all the updates. I first installed Wk2 w/SP4 then installed SP 5.1 and all was fine. Next I installed Windows2000-UpdateRollup2-x86-ENU.exe and that is when the problem surfaced. When I put the laptop in Standby mode and go to bring it out of Standby, I get the STOP error. It will then restart OK and sometimes will go through a chkdsk. Any ideas?