Windows 7: I'm having slight issues with my hard disk drive?

My hard disk drive is acting weird. Anytime I download a program, I lose space on it, normal, right? But the thing is, when I uninstall some programs I would get back my space, sometimes WAY more space than intended. But if I also uninstall some programs too, the disk space remains the same, doesn't give me space when it kind of should. I restarted my laptop, looked for empty files on those certain programs, all were gone like normal. Yet the disk space doesn't do anything.

I have 320 GB, the actual disk is 279 GB, and I have 224 GB remaining. I was experimenting with downloading Firefox, Aurora, and Nightly browsers all belonging to Mozilla, each were about 30 to 40 MB. I uninstalled all 3 and it's belongings, and after the files were empty, files were not even close to 1 GB.

My point is if I install a program which is like a few MB and the file sizes are the same way, I would lose 1 to 4 GB a day and gain them back randomly.



What is this problem and why is my HDD acting this way?

Thanks.

What you need if your uninstalling programs is revo uninstaller this will uninstall everything associated with the program when you use the programs uninstaller it sometimes leave reminance behind.