Hi, i'm encountering an annoying blue screen, when i am trying to start my Windows 2000 machine after having upgraded to Parallels 5. (1 Unbuntu, 1 Windows 7 and 2 Windows XP machines all work well). The blue screen says the following: STOP: 0x0000001E ... KMODE_EXCEPTION_NOT_HANDLED Address BFF9B680 base at BFF7A000, DateStamp 382a167c - acpi.sys I tried the several solutions, that can be fount in this forum. If I'm setting up a new machine, I get the same error. No matter if i'm using the original CD or the ISO-Image I took. Does anyone suffer from the same annoyances? Does anyone perhaps have a solution? Thanks for your help in advance. Apu N.