I have 2 drives, a 120GB SSD that has the operating system and essential programs, and a 3TB HDD for games, movies, photos and everything else. Recently when I logged on, I notice in Task Manager that the 120GB OS drive was hovering around 85-100% even though I was running no other programs. Resource Moniter showed lots ofbit reading and writing but I don't know what to do with the information it gave me. Suspecting it was a virus, I did virus scans from Windows Defender and Malwarebytes but they detected nothing wrong. I deleted temporary files but that changed nothing. I ran SMART tests of the drive from Data Lifeguard. Both the quick and extended test gave the drive a pass. I read on the internet that you are not supposed to department an SSD. So I don't know what else I can do.