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#61
Okay please complete the backups.
This boot disk will boot you into a full functioning Windows and you can copy off everything.
Windows 10 Recovery Tools - Bootable Rescue Disk
Not sure how close you live to a computer / office store but you might find a portable hardrive will be cheaper than SD cards.
Western Digital (WD) makes them in crazy sizes like 2TB or 3TB and they are competitively prices. I prefer raw hard drives and a small dock. Far more reliable but a dock and drive will likely be between $80 - $100.
Once you are backed up I would like you to try what I posted earlier about going into safe mode and running the AVG remover.
Talk in the morning.