Thank you rproffitt,
The random generation of folder/file/process/Reg.Key name is what I thought might be the case, perhaps the only rational explanation that there is. Will certainly look into Safe-Finder removal guide on BleepingComputer, to start with. Downloading apps from places that you never heard of before ... just what was I thinking. It's not like I regulary stick my hand in the snake pit, but every now and then I trully amaze myself, by doing something completely irrational and very likely harmful as well. Go figure ... the Pink Floyd's tune "Momentary lapse of reason" best describes such a state of mind ...