I have used Everything (which searches the whole hard drive, in seconds) and it didn't find vgx.dll. I have also manually looked at common files/microsoft shared/ and there is no vgx folder at all, so ... My installation is nLited, so maybe I've removed something which also removed "vgx" thing. EDIT: Yes, it's nLite, because I've just checked one of my backup images, which has nothing removed and there is "vgx" folder and vgx.dll. Solved, thank you both of you.