Hello @spinkee,
could you please provide the log file as described in Howto troubleshoot issues with the easy-installer
“could not unpack /e/ install archive”
I assume the installer stops after this error, right?
That would mean, it was able to detect that your have a FP3(+), download the correct installation archive, verify the download is not corrupted, but then is not able to extract the actual installation files from the install archive.
Without the log my first guess would be that you hard drive might be full? The install archive is around 1 GB. After extraction the files take another 2.2 GB on top.