Since you can't download things on your machine, please use a friend or family member's computer and download the following tool and it's manual update from the link below.. Once downloaded, rename the program installer "mbam-setup.exe" file to something else like "Gogetum.exe", then copy the installer file and the update file to a CD or flash drive.. Transfer the file to the problem machine, then install the "Gogetum.exe" file, then run the update to get the program current.. After that, run a full system scan and delete anything it finds.

Malwarebytes Download Link (Clicking on the links below will immediately start the download dialogue window.)

Malwarebytes Manual Updater link

Hope this helps.