Whenever I open osu!, the game starts lagging when I try to move the mouse. When I'm scrolling through the beatmaps with my directional keys, the game runs fine, until I actually move the mouse. This bug has been going on for about a week now. Yes, I have a Windows 8. Yes, my mouse drivers are up to date. I've done everything I can that this site has recommended I do, but nothings changed. Please help, I want to start playing the game again.
osu! version: 20150401.2 (latest)
osu! version: 20150401.2 (latest)