I've been an enthousiast reading user of this forum since 2004, and i Always found out what i needed to know. But now i seem te end up on a dead end street. When windows 8 came out i bought the upgrade license. The iso that i downloaded was burned on a dvd and that version i use to make clean installs. (i also bought several licences for all my family-members) for the computers in my family. For xp, vista and 7, i always used an updated iso, and even some of the unattended. But with win8 this is a *&^%$ to do. Anyway, being sick and tired of updating online (or even wsus offline) i wanted to update my iso. Since 8.1 was already installed i downloaded the 8.1 iso through the well known microsoft-trick. I did this with one of my legal keys, and with an generic key provided on a MS page. Both 8.1 iso's downloaded perfectly. These iso's install ok but i want to slipstream the latest updates into them. The 8.1 iso (as well as the Original 8.0 iso) contained the install.esd instead of an install.wim. When i use a program like winreducer my iso is recognized as an upgrade version. I managed to use my iso and convert its esd file to a wim file. When i replace the ESD with the WIM file it accepts the extracted map and i can install updates but when i make it an iso again, that iso won't install. So, where do i go wrong ? or is it impossible to slipstream into my version ?