It's up to you. There could be a problem with a driver, there could be underlying hardware issues. Windows 10 has a pretty wide array of drivers available, but some manufactures/vendors are refusing to provide driver updates for their older hardware on this OS.
For reference, I ran into an issue with my Lenovo laptop. It also ran fine for a while, then started randomly gong to sleep. In my case, going back to Windows 7 fixed the issue for me. I did notice that, in my case, there were some fairly "vanilla" for a couple of my devices, and I found this to be due to the fact that the manufacturer wasn't providing their own drivers for Windows 10.
But that was just my case. If you want our help, give us more specifics, and try looking at the System logs in Event Viewer for any clues as to what the problem might be.