Could be software or hardware. When was the last time you thoroughly cleaned the inside of the computer so it won't overheat, they are very efficient vacuum cleaners. A failing hard drive or memory could cause that. If it is software other than a corrupted program a reinstall of Windows 10 from within the program will pretty much replace the windows installation without affecting any of your data or programs. Without any other information it is pretty much a process of elimination. Try restarting with shift pressed to avoid saving any data for hibernation or sleep. Those files corrupted can cause all sorts of fun.