Hello. I have a vista ultimate, use avast free, malwarebytes. I regularly scan my whole system. A month or so my computer stopped shutting down through the user interface. Sometimes it reaches the "logging off" screen then stops. Sometimes it reaches the "shutting down" screen then stops. It will just hang like that for hours, until I finally have to shut it down through the power button on the laptop itself.
Also, I once tried to check the previous versions for my computer, and the computer tells me that the previous versions service is not running.
Also, I the installer for windows does not work. I was trying to install Adobe Flash and it keeps telling me that there's a fatal system error. I have installed Photoshop, Indesign, Dreamweaver, and many other Adobe products on my computer. I have even installed Flash before, so I dont know whatl happened this time. The computer will usually install minor programs, but sometimes it wont. Also, it wont install superantispyware.
Also, the computer sometimes will not open certain programs and flash a box that says "No threads can be created in the system."
Like I said, I've tried a full scan with avast and malwarebytes, even in safe mode. The results keep telling me that the computer is clean.
Thanks.