[W10] Disk size keeps expanding out of nowhere

[Windows 10]

Hello,I need URGENT help regarding exceptionally bloated C: drive. Just a few hours ago 17 GB of space was available, but just now I spotted it's now less than 300 MB and it keeps getting less and less. I can't recognize the reason behind this all, I've run sfc/scannow but it didn't help, I've run a scan for malware and it also went into vain... what to do?

Continue reading...