Driver_Power_State_Failure Windows Vista Ultimate(Windows Shuts Down Unexpectantly) This is my latest problem that I am having. My system all of a sudden Blue Screens and then restarts. The Blue Screen says: Driver_Power_State_Failure with a bunch of codes that I have been unable to catch. When I go to 'Problem Reports and Solutions' this is what it tells me: WdiSystemHost Service hang Report Description Service Diagnostic System Host hung on starting. Problem signature Problem Event Name: ServiceHang Service Name: WdiSystemHost Image Name: wdi.dll Image Version: 6.0.6001.18000 Service Type: 20 Start Type: 2 OS Version: 6.0.6001.2.1.0.256.1 Locale ID: 1033 And this is the other one: WdiServiceHost Service Hang Report Description Service Diagnostic Service Host hung on starting. Problem signature Problem Event Name: ServiceHang Service Name: WdiServiceHost Image Name: wdi.dll Image Version: 6.0.6001.18000 Service Type: 20 Start Type: 2 OS Version: 6.0.6001.2.1.0.256.1 Locale ID: 1033 Extra information about the problem Bucket ID: 159664685 Extra information about the problem Bucket ID: 160179788 And this is the 'Windows" report: Windows Shut Down Unexpectantly Problem signature Problem Event Name: BlueScreen OS Version: 6.0.6001.2.1.0.256.1 Locale ID: 1033 Files that help describe the problem (some files may no longer be available) Mini031809-01.dmp sysdata.xml Version.txt View a temporary copy of these files Warning: If a virus or other security threat caused the problem, opening a copy of the files could harm your computer. Extra information about the problem BCCode: 9f BCP1: 00000003 BCP2: 8758B028 BCP3: 875E3AC8 BCP4: 855459C8 OS Version: 6_0_6001 Service Pack: 1_0 Product: 256_1 Server information: 11ed2924-b739-4004-838f-9ed3d33c980e Each one has caused my computer to Blue Screen and restart. It has shut it down 32 times in the WdiServiceHost, 45 times in the WdiSystemHost and 33 times in Windows! It's really getting annoying! Has anyone else had this problem with Windows Vista Ultimate? I bought my copy from www.compusa for about $190 but noticed that there is one priced at $310. Did I buy a cheap version that could have problems? I really need to know the difference because I am advising some friends on their upgrades. I was informed that it could possibly be my power supply but I have replaced the 330W with a 600W but I still have the same problems as before. I have attached my last two minidump files. Thanks! I really don't know what to do and if i can't find an answer..........I might as well go back to XP!