Sometimes Windows Defender (Rarer cases Malwarebytes) have issues dealing with specific malware/viruses in normal mode, you could try the following as a solution:
1. Restart the PC in "safe mode with networking"
2. Install RKill and run it to kill any malicious services. You could try removing the virus manually, delete its files.
3. Install any popular antivirus and do a quick scan (Majority of the providers do have free versions of their software). Or just use Windows Defender. It works really well in most cases.
4. Install and scan your PC with Malwarebytes and Hitman Pro (Maybe ADWCleaner).
5. Restart PC in normal mode and do another quick scan with Malwarebytes.
Let me know if this helps. In theory, it should solve all of the...