Yeah, it's most likely a virus. I can't think of anything else. It also disabled your KasperSky A/V. Since safe mode limits usage of different things then the virus is probably unable to do damage. Whereas if you are on normal mode, nothing is limited, allowing the virus to do whatever it was programmed to do. On safe mode do a virus scan... That should be the first thing you should do. Use MalwareBytes Anti Malware, update it and scan your PC. Also make sure you're not signing into anything on your infected computer. Change passwords if needed on a seperate PC.