Hi,
thanks for the quick reply.
It is a possibility of course that the problems I have are caused by my hardware.
I don't believe my computer is overheating, though. I has been shutting down shortly (maybe 10 minutes) after booting and me doing nothing that would require any hard use of components. I've been monitoring the CPU temperature, which doesn't go up very much. I've cleaned the computer and checked the cables for loose contacts.
It shuts down rather randomly, sometimes after hours of running without problems, sometimes shortly after booting.
It doesn't shut down normally, it just loses power, as if I had pulled the plug.
I also once was unable to do a normal shutdown, screen going dark for a second and then back to the desktop again. I could shut it down after a reboot.
I know this seems to be a hardware-related issue, but I'd still like to check for malware.
I un- and reinstalled the latest version according to the link you posted. My problem persists:
When I try to run the program, only the notification in the taskbar appears. I also noticed that the notification seems to disappear whenever I put my mouse cursor over it.