My C drive is 240 Gb. All of my C files including the hidden ones are about 90 Gb. Just two days ago suddenly the C drive got full. I tried to look for files of huge size and nothing exists. I cleared all temp and unnecessary files, which freed up around 1 Gb but that got occupied again in one second. I cleared my downloads files and the recycle bin (around 10 Gb both) and again within two minutes the C drive got full again! I tried all programs out there, one by one, and nothing worked!