Hi, I have asked this on a couple of forums, as it's gone on since I built this pc four years ago! It started when I used Avast! Windows action center reported 'windows was not shut down properly' click technical details and it says " the previous shut down was not expected" nothing further. There is nothing in event viewer, no criticals, no kernal power, nothing just endless 'windows was not shut down properly' in action center. Here's the deal, I only get it when I instal Kis 2012. any Avast!, Dr Web, my isp (trend). I get it on every shutdown, even when I have twice reinstalled the operating system, with bare essentials (mobo drivers etc) It doesn't make any difference wether I'm on standard clocks or over clocked. My bios is the latest. The only way I can stop this (it doesn't happen on clean boot) is to use Eset Smart or Nod 32 or mse, or use no anti virus. There is something hanging on shut down I guess, and in the four years I have had the pc I cannot find out what? otherwise the pc is rock solid and very stable, prime 95 can run for 4 days without errors. Any ideas to put me out of my frustration? Cheers. It's Windows 7 hp 64 bit Amd 940be @ 3.4gz 2X2 gb ddr2 8500 ram 2X samsung F1 500 gig MSI diamond Nvidia 295gtx. Thermaltake 800 wat.