When I try and use the ue4 editor or download ue4 plugins from the epic launcher my cpu usage goes to 100% and almost crashes my pc

Every time I download something off the epic launcher or try to open the ue4 editor my cpu usage goes to 100% with 80-90% going to the launcher / ue4 editor i’ve ran the ue4 editor before on the same pc and it worked just fine but after i factory reset my pc it started to act up. is there any way i can fix this?

but after i factory reset my pc it
started to act up

What does it tell you then?

If the machine cannot work under sustained 100% load, there’s probably a software / hardware issue untreated to the editor itself.

with 80-90% going to the launcher

What CPU are you running? Decompressing data is taxing. Have you considered monitoring RAM usage - a common culprit with frequent crashes.