Restart in Safe Mode and do a System Restore to a date well before you got the infection that caused all of the other problems. Restart into Safe Mode with Networking. Download, Install and Run Malwarebytes. Remove all it finds. Update your antivirus program and run that also. If either or both found a number of things, rerun Malwarebytes. Restart into normal mode. If you still have issues, let us know, but you may be better off reposting then in the Virus Forum here.
You have to be a little bit crazy to keep you from going insane.
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