There are all sorts of online scanning services available, they have varying degrees of success depending on the particular service, and the particular malware.
This particular malware reads like it might not be easily removed without a more tailored approach.
I have no experience with
PC Repair, Installation and Help and Support | The TechGuys , so am unable to comment on theirs. (looks like it might cost something, though.)
All very depressing
Sorry about that. It doesn't actually need to be.
How keen are you to dabble and learn?
Some of the forums of which I speak are very good at helping the technically challenged. (Step by step instructions, screenshots etc.) I could even have a go myself. (But would rather leave it to someone with a formal qualification, for your peace of mind and mine.)
I'll ask again: what AV was installed?
A rather big point worth making here is that PC protection is a multi-pronged beast.
-You have the physical security of the PC. (Won't get stolen. Or if it does, there is no sensitive
non-encrypted data on it.)
-You have the software/hardware to protect it from web -based attacks. (Router, firewall, antivirus, everything updated, limited user account for the web facing apps, the list can be as long as you want.)
-And last but not least, you have an imaging program, or backup procedure, that periodically backs stuff you don't want to lose to an external media.
Horse/Barn door. Sorry. But next time.