there was something like 6.x after 6.0. ( you can't look up when you're not at home, that making me crazy
) that 6.x had a lot better browse functionality, in .net it's just luck if it works, and some functions were even removed.
and for slower computers .net isnt the best choice, the compiler is significantly slower, although some stuff like asm intrinsics etc are now working by default, no update needed there.