Well you could try Q4OS Plasma. I installed it on m'lady's tower I built in 2006 with single Athlon AMD 64-bit processor (2 GHz), 2 Gb RAM, and an EVGA 512 Mb 8x AGP card. Is quite slow in response times, set with Win 10 theming via Look Switcher and Tiled Menu from zren via add new widgets.
Hi there, just for the record I installed *Z 'lite' > same result.
I'm convinced Zorin is not responcible for the slloooow performance, this hardware just doesn't like linux.
cheers CD