I suspect it is something malware related, but some of you will know better.
I have a Toshiba laptop with Windows 7. The past days I keep getting windows alerts that I'm running extremely low on disk space - when I'm actually not. I have about 60GB free, but it seems that some kind of file keeps building up on size and fills my HDD - or perhaps just causes false HDD space readings. Reboot will most of the times fix this, but some time afterwards the disk space starts decreasing again, until I get the aforementioned alert. As a result, I get software malfunctions when I try to save my work.
I'd really appreciate some help, because I can't find what's causing this.