Hello! It looks like that you have VMs with UEFi, but not with BIOS, thus converter cannot activate repair mode. There is no need to install VDDK driver, it is built in StarWind V2V converter Please try to convert VM one more time without Windows repair mode. I was able to successfully complete the...

Looking to Convert from Hyper-v 2016 to VCenter (ESXi). I'm trying to convert Hyper-V Guests with them powered off and at the very end, getting 'VDDK Driver not Found' and following clicked 'ok' another message in the same window 'Failed to Activate Windows Repair Mode (Not supported OS reside on th...