I will try that. When I ran ccleaner to get the info I previously posted, ccleaner crashed and I couldn't open the task manager let alone click on the shut down icon. Everything became unresponsive. So I had to force shut down and reboot. This happens every time.
EDIT: I disabled bitdefender and ran ccleaner but I ran into the same problem yet again. It crashed, the system was unresponsive, if it's relevant: the gadgets that I have running (CPU+RAM/network monitors/intel cpu monitor) were still operating, but I couldn't open any programs, nor could I shut down so I had to reboot but holding down the power button.
Also, I've tried to run ccleaner in debug mode and followed the aforementioned link but I still cannot get a log file out of it.
Deselecting "Temporary Files" under the "System" subheading in the "Windows" category gets around the problem. But I would still like to know why exactly this is happening and what the cause of this is since the temporary files is something that needs to be cleaned up.
Thank you all for your replies on this matter, much appreciated.