(Hi again Broni,) You helped me earlier(a few days ago) with som malware-removal. You also pointed out that I may have OS-errors due to cpu overheating because of irregular fan-functionality. Now I have discovered that a strange hidden file could be correlating to the fan-problem. This file has a hexadecimal(it looks like that by the letters/numbers but have not calculated the name for a test) name and it´s filetype is dmk. A search on internet gives no result except a few short notices and some kind of malware-indication! On the other hand I found that certain virtual disk programs handles certain dmk-files! But I have not installed any Virtual Disks! There is only a service named Virtual Disk in Vista for handling of disks, volumes and filesystems under the normal Disk Management(Control panel). Every day when I log in I check my WinPatrol/Scotty for changes in the file-system incl hidden files. Every time when my fan is not working this above mentioned file shows up in WinPatrol as hidden. I then delete it via WinPatrol on next boot-up and my fan starts working again and rather perfect after a while. Temp is 41-52dgrs C with maximum 58 C. At the first boot-up after the file is deleted it could take one or a few hours until fan is working 100%. But this file keep coming back every 2-3 days. I have to find its origin! Help wanted! The file is a temp-file as well placed under "Users\myself\Appdata\Local\Temp. Always the same temp-folder! Maybe there is a chance that this file is created because of a not fully un-installed program? Next time this hidden file appears, how shall I find its origin? What process is behind this file? Last time Broni helped me with malware this particular file disappeard. But I can not remember if the deleting process/action was made by TFC-program(temp deleter). Possible!