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C drive keeps filling up on its own
Hi,
Sorry if this is a long post.
The free space on my C drive is constantly very low and sometimes I have no free space at all, even if I haven't downloaded or installed anything. When I do install things (which doesn't happen very often) I install them on an external drive that has a lot of free space left.
But even then, the installation can't happen sometimes, because some temp files need to go to C, where there is no space. The same thing happens if I try to download a file to the external drive; it doesn't download because C has no space. At some occasions I can't open images on my PC, or see gifs on the internet, when I have no space on C.
For a long time I thought it was the pagefile that caused this, because it kept growing, but apparently it's not, since it looks like it stopped growing at 3,70GB.
So, yesterday, when I had 0 bytes left on C, I decided to open CCleaner and remove some unneeded files to clear up some space. In the end, CCleaner said it cleared 727MB, which was more than I expected. I immediately went to check how much free space C had. It said something aroud 500MB. I refreshed the window and it showed a little less. I refreshed again, and it was now even less. I kept refreshing every second, and the free space was always a couple of MB less than before, until it went to 0 bytes again. I was not downloading anything during all this.
It looked like something found the space to grow more and it did. I checked to see if Windows found the opportunity to create system restore files and therefore filled the newly cleared space, but it didn't.
It should be noted, however, that it's not always reduced to 0 bytes. I have 5MB of free space now, for example, and whatever it is that keeps growing doesn't seem to grow right now.
I looked about this online and saw that some people have similar problems. In some threads I found, malware or viruses were suggested as possible causes. I scanned my PC with Microsoft Security Essensials, and it was clean. I downloaded Malwarebytes and tried to scan, but it always said that Malwarebytes encountered a problem during the scan. I uninstalled it and tried to install it again, to see if it would work now, but I couldn't install it this time (on the external drive) because C didn't have enough free space, even though it had something like 6MB.
What could be causing this problem?
Thanks in advance.