So this afternoon, I had about 200 MBs left in my C drive and about 13.5 in my D. My C drive was constantly changing, ranging from about 800 MB down to 30 MB. My D drive stayed the same. Then, when I ran Disk Cleaner to remove my System Restore points, and turning System Restore back on (after it got disabled due to low disk space), I suddenly gained 16 GB of space in my C and about 9 GB in my D.
I suspect the constantly changing space in my C drive was due to Windows Files like Pagefile.sys or something, but is it even possible for System Restore points to take up oodles of GBs in different drives? Or is this some sort of elaborate virus scheme to make me think I have more disk space than I really do, and it's actually sucking it all up?
Do you have Windows security essentials installed?
If so, it moves around files pretty often for some reason. Whether it thinks it's a virus, or it just feels like annoying you, we don't know.
I went for 8 Gig on C (That's a tiny partition, so i don't have to format my entire drive every time i need to install windows again), and then it went down to 200Mb. So, i disabled realtime protection, and it went straight back up O.o
I was downloading a lot of large files onto my main drive (D) whilst my external HDD (1TB) wasn't plugged in. I got down to about 30MB without noticing until Windows Alerted me. I didn't do anything immediately I was busy. But I did have a quick look as it popped up. I came back to it a few minutes later and it was now at 100MB free space. I hadn't deleted anything, I assume the pagefile must have emptied out a bit.
I ran CCleaner to gain some leeway for my downloads as I shifted movies and things over to my large external drive. I cleared out about a GB of space with CCleaner and about 30GB moving movies over and uninstalling some games and deleting redundant files.
I think Windows tries to automatically free up space. Clearing out some restore points, pagefile etc? My harddrive space always decreases over time after running CCleaner anyway.