correct way of integrating updates for windows 7 custom iso in NTLite Posted November 4, 2020 Your choice if you want to update boot.wim environment. It's being used only during Windows install, first portion when booting. If using at home, I don't think there can be any tricky situation. If capturing WIM images from that boot, then at least update servicing stack (since 2009 latest ones it means cumulative update as well). Driver integration is another story, make sure to add them to boot as well, if Storage or USB drivers. Rufus and Win7 boot requirements belong on Rufus forum - but first make sure the correct drivers are integrated, that link you provided has plenty of info. Maybe they also know about that exact error code situation.