Hi, I'm Bhavik. Welcome to JustAnswer. I'm reviewing your question now, and will reply back ASAP.
Did you try system restore ? I think you should try this if not already done.
Restore your system to any date prior to 6th Jan
Yes, For remote screen sharing you have to pay extra.
But if you are comfortable with computers then I can give to step by step instructions and you can simply follow them.