Skullgirls should work on prettty much any desktop computer with a dedicated graphics card, unless it's mega ancient.
Laptops are a bit harder--- it won't work on your average laptop from 3+ years ago unless it has a non-integrated graphics card, but all the newer ones should run SG fine without a graphics card(thank you, HD3000/4000).
If it's Windsagio, he really doesn't like Mike. No idea the reason.
Windsagio is some sort of game designer now(I think, not sure), but before that he was a pretty active theorycrafter on SRK forums(he may still be, idk). In the months leading up to Skullgirls' launch he was a pretty vocal detractor of Skullgirls' MVC2-inspired design in general--largely because he felt that imitating the older games to that degree was creatively bankrupt, IIRC.
He was also a vocal doubter of the IPS, and dead certain it could be 'broken' in a way that defeated its purpose; at some point he and Mike exchanged words over it, and Mike Z called him out because all of his criticisms were based on theory and not any form of testing or implemented design he'd done himself. I think they weren't big fans of each other up until that point(or at least in Windsaigo's case; not sure if Mike had read his stuff until then or not), but that was where it seemed to cross over into 'beef' territory to me.
I remember this because I encouraged that discussion to happen; Windsaigo or 'xes' as he was named back then was someone I thought was pretty bright and consistently willing to take up smarter(if pure-theory-driven) arguments versus the SRK old guard, who literally thought copy-pasting Capcom/SNK design philosophy was the only way to make a fighting game. So maybe you can blame me for the bad blood, heh.
For the record, I still think the guy is very smart, and will probably make something very interesting one day if he continues to apply himself.
Anyway, tldr is that Mike Z is a guy who doesn't mince words, so he sometimes makes enemies like that.