Hi, I had this problem about 2 days ago, I couldn't open for example Steam, or any media, but apps I can't open now worked fine when the problem started. I think and I was sure it was malware so I did a check and cleaned my PC about 6 times with Avast and MalwareBytes but it still consists. Other details are applications like Google Chrome work in Safe mode. I didn't download anything for about 4 days expect a study sheet for a test. I am able to open Task Manager.