You could also just use the original tool on which the copy is based on: MDL Win 7 Tool for SiMPLiX UpdatePack AiO ISO (with install.wim/esd) Creation Original Win 7 SP1 source ISOs are provided in post #3 Original Bypass ESU: https://forums.mydigitallife.net/th...-extended-security-updates-eligibility.80606/ or just apply the monthly releases SimPLIX updatepacks: Simplix Pack to update Live Win7 System/ Integrate hotfixes into Win7 distribution (also provides the SP1 direct msft links).