Do you not have restore points you can use?
The sequence I would prefer using is:
- boot to safe mode (gives you control of the PC again)
- fall back on a restore points (reverts to a point before the infection)
- after a Reboot
- run CCleaner (removes all files that don't need scanning)
- then use Malware/AV scans (scans for any remnants of the virus)
Thanks for the warning about MSE and Malewarebytes not finding it though.