I am having the same issue as the one you are talking about here. I have a Citrix Farm with numerous Windows 2003 TS / Cirtix servers and ~ 400 clients. We have four servers that handle one published app and we have encountered the problem with HPBOID and HPBPRO.EXE eating up all our resources. Has anyone found a "Document" that either Citrix, Microsoft or HP has put out addressing this issue and how to go about fixing it? When I called HP it was a joke. "We don't support using our print drives in the way you using them"... BS. I basically just want to rip out the HP Port Resolver service and any print driver that installed that service. Any help is greatly appreciated. paul.mooter@avistacorp.com