hpst Man, I have dual system, 7 on one drive, 10 on the other. Same system, same GPU, same everything, and win 7 feels almost like paper to my eyes, while in 10 I cant focus on pixels and end up getting eye strain. Its not interface or anything, happens with videos, games.. so go figure. Once I had the same problem after upgrading my Android OS on the phone, gingerbread was fine ICE wasnt. I even have the same phone (got it from my mate) that has a darker display for some reason, and color gamma is a bit different too (SAME model Xperia st15i), and I get headaches from that one, while mine goes full bright and is fine.