Now exit the installation process and reboot the machine (don’t force it off, just let it reboot and then open the computer’s boot manager to boot into the Vista USB. which likely pinpoints it to being a problem with diskpart’s conversion system to GPT and the Vista SP2 installation environment: on the disk/partition selection, open a command prompt window (Shift+F10) and type the following:ĭON’T TYPE CONVERT GPT! IT SEEMS TO JUST COME UP THE ERRORS AGAIN, ALSO REPLACE ü WITH WHATEVER YOUR DISK IS OF COURSE There is a way around this and it’s fairly strange to me. It’ll complain about being unable to boot from the device on your machine and then fail to create the partitions correctly with an error. This works on an OptiPlex 390 using Vista SP2 圆4 and a HDD in UEFI mode, booted from a UEFI+GPT USB (made from the original MSDN SP2 ISO and Rufus 3.5).įor some reason it seems to bug out when trying to install even to a clean HDD. This took a while to do here properly but I figured it out in the end. MAKE SURE SECURE BOOT IS OFF WHICH IT PROBABLY IS IF YOU ARE READING THIS, ALSO MOST VISTA COMPATIBLE MACHINES LIKELY DONT SUPPORT UEFI

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