Originally Posted by DiapDealer
Disabling sse2 in the configuration of Qt5 takes WebKit off the table, it seems. Sounds like a true deal-breaker for getting Sigil 0.7.x to run on older non-sse2 hardware.
I think that note needs to be added to the download page, with instructions to use Sigil 6.
This also affects XP running on processors like the AMD Athelon 2600+