I have my hard drive partitioned into two drives (C and D) and I cleaned up my C drive to where it was 20GB Free of 265gb. I shut down my pc last night and this morning the C drive is now 3GB free of 265GB, wtf!?
Hopefully your HDD isn't dying. Time to do error checking with surface scan? But back up your important stuff first... Hopefully it's just your swap file eating the extra space for some reason or other (say, some activities that start at bootup, like virus definition updates or .net optimizations). It does sound like you need a larger HDD though!
must be swap or recovery data(if you have that enabled) i would run ccleaner, inspect how many GB has been cleaned up, save that info. restart the pc, do your usual.. restart, etc.. then ccleaner again and see what it cleans up. it'll show you what large quantity of data is temp and being cleaned out. second, i wouldnt even allocate that much hdd space to your os partition. i would allocate about 60-80GB to c: OS, about 10GB to D: temp and the rest for games/movies/apps on e: storage partition use windows temp variables pointed to d: temp, firefox/ie, pointed there too.