I have a Core 2 Duo desktop from 2008 with 3GB RAM which I almost never reboot manually running Windows 10, and I can't replicate your experience (the fans are

I have a Core 2 Duo desktop from 2008 with 3GB RAM which I almost never reboot manually running Windows 10, and I can't replicate your experience (the fans are always on, but it's a desktop). Granted, it has an SSD, so disk access is not slowing the machine down as much, but so do all the computers today.