Diablo running strangely slow

Hi
I've been playing Median XL Ultimative for about half of year and nothing was happening. But yesterday I turned on my computer and Diablo was running slower than normaly + when I start Battlenet I can hear some 'crunches' in my headphones, especially when I'm listening to music. Know what could happen? I'm using normal Diablo without any other programs. Before that everything was perfect.

Are u using right patch for d2 and lastest version of median ? Did u change some settings in your system and/or in diablo ? do you use d2se ? what crach error you get, send screenshot of it if u have.

I've found a solution. I was playing in windowed mode and then that was happening. Now I'm playing fullscreen and everything is fine. There wasn't a crash, just slow diablo and crunches in headphones. Everything was clear, nothing was changed. Thread can be deleted right now.