I decided to restore my computer to factory settings using a Windows 7 Home Premium CD and after the reboot, I cannot search for Windows updates, I cannot connect to any network even if I try to plug in an ethernet cable, I also tried to enable hotspot with my phone but the computer can't detect USB(version 3.0 doesn't work), I checked all my files and I noticed (E: ) being 200 GB remaining out of 2 TB and my (C: ) being 3 GB remaining out of 256 GB as they previously were before the computer reset, I tried deleting all the old files, but it does not show any remaining size, how long it takes and so on, my conclusion is I have some virus which won't let me delete all my files and restore my computer to factory settings. Can someone help me out with this problem?