We have recently installed all new computers and upgraded all windows XP Pro . Since the upgrade we have had massive multi user lock ups, stalls and/or error messages withing Mas90. We aslo just upgraded to Mas90 4.10. The lockup/stalls etc occur daily and mostly with 2 of the users that are in the system the most. >:-< We have tried everything including putting Mas90 on its own file server, upgrading the memory in the two machines to 2 gigs of RAM. All the virus checks and we are still experiencing the same problems. We are out of solutions... any other ideas.%-)