@PalmettoProCon assume ALL of your accounts and passwords HAVE BEEN COMPROMISED!!!!  And also KNOW your computer is infected with various spyware and probably key loggers.

During those 45 minutes the criminal was connected to your computer they were pulling down everything that they could and installing programs to access your computer.  If your User Names and Passwords are stored in anything but a PROVEN high encryption password safe, they will gain access if they found the file.  Go change EVERYTHING.  And YES, I AM TRYING TO INSTILL FEAR!

And just to confirm, YOU called Microsoft for the repairs and it was from a good number you know is really Microsoft.

As the techs are working, be sure to ask them how they find spyware and what kind of spyware do they look for.  If they do not reply with specific programs and searches they preform for key loggers, phone-home bots, etc., then you need to have them bump you up to the next level of support.

For others reading this thread....   If you know of anyone that has actually let someone connect remotely to their computer that they did not reach out to and are not a know entity, I'd have them immediately disconnect from the internet (unplug and DISABLE the WiFi).  Then reach out to local police, FBI or other known group with a cyber criminal division and ask them for local service techs that specialize in cleaning machines.  They should have a list of reputable organizations.

If that's not an option.  I'd strongly suggest you pull off your data files (e.g. QB.QBW file, Word Docs, Excel spreadsheets, etc.  But NO programs.  Then wipe and rebuild your computer from scratch.