So far so good, there are a couple of suspicious files on your system.
You need to enable windows to show all files and folders, instructions Here
Go to VirusTotal and submit this file for analysis, just use the browse feature and then Send File, if it says this file has been checked before, have them recheck it. When the scan is done just copy and paste the link back to this forum for me to see.
I'm afraid after numerous attempts I haven't been able to locate either file. I did follow the instructions to make hidden folders visible but even when I copied and pasted both file names into the search bar I couldn't find them.
At this point a complete format of your hard drive and reinstall of windows would be the only option. This virus can spread via usb thumb drives, I think it may be safe to back up any documents or pictures to a CD, not a thumb drive. Any programs that you installed that you have downloaded, the exe file to install those programs are infected as well, this virus infects all .exe files on your system.
I hope you followed my previous instructions to use a known clean computer to change all your passwords for any banking or shopping sites you use.
If you need help with the format and reinstall, please let me know and I can link you to a good windows forum to help you.
Thank you for trying, if you could link me to any of the windows forums re: reformating I would be grateful.
Do you think it would be worth my Mother alerting her bank as she has used her debit card on this laptop before but it was a long time ago and as far as I know she hasn't noticed any strange activities on her statements. In any case all of her passwords have been changed on my Mac which has had no contact with this laptop via USB or any other medium.
As far as the bank, it wouldn't hurt to give them a heads up.
You can post here, you can also link them to this thread so they can see what we have done and what where up against. This forum like Safer is free but you will need to register, use the same user name that your using now so that I can find you and follow along and offer any advice that may be needed.