Computer slow to boot up and not recognising devices

[Frozenflame65]

My desktop computer takes 5-10 minutes to boot up now, and almost every time I turn it on, a device won't be working, like my mouse/keyboard not responding, or my headset not showing up when I try to select it by the volume bar. Also, I often can't type in the cortana search bar at the bottom left, despite being able to type everywhere else. However, after half an hour of trying to find solutions and typing this, the final two issues seem to have fixed themselves, but these have happened before and will probably happen again. This is a relatively recent problem, which started when I bought a new monitor, its made by AOC and I doubt it has anything to do with it but I don't know. Is there anything I can do to fix this? My computer is running windows 10 and my only downloads are from steam, blizzard or adobe, so I doubt it is a virus or anything.

 

[scout_03]

list all parts in system you could have power or drive issue even memory