Sometimes merely accessing the recovery function, will cause the computer to go through the startup repair process and fix windows. Its rare, but it does happen.
With that being said, I think we should do a bit of preventive maintenance.
For good measure first run the free trial of hitman pro and have it delete anything it finds.
Once it runs and finishes, have it remove all it finds..
An easy way to access the command prompt, is to hold down the windows key on your keyboard and press the letter X. ( The Windows key is two keys to the left of the spacebar)
Right-click Command prompt, and then click Run as administrator.
Type in SFC /scannow and hit enter.
Once that repair is complete, you may also want to run this command next
Dism /Online /Cleanup-Image /RestoreHealth
Once both are complete and you have removed all viruses using hitman pro.. You should have a reasonably solid foundation for your machine to continue running and avoid the previous issue from re-occuring. If you have any questions or concerns, let me know.
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Senior Technician and Network Switching Systems Operator / Maintainer.