Hello! I searched for posts with similar issues, but couldn't find anythind useful, so here's my problem. Recently i updated from Windows 7 to Windows 10 and got large fps drop. On Windows 7 i got 240-350fps and on Windows 10 fps decreased to 90-150fps. My graphic card drivers are up-to-date. Nothing loads my system either. I attached screenshots of frame time graph in menu and in-game from each OS. Hope they will be useful!
Win7 menu
Win7 in-game
Win10 menu
Win10 in-game
osu! version: 20171227.2 (latest)