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Please help.
When i open osu its lagging and it only shows on the upper left of the screen
Make sure your graphics drivers are up to date. See here: https://osu.ppy.sh/wiki/GL_Support_Issues
You could also try enabling Compatibility mode. Hold shift while launching the game and don't let go until a recovery dialog pops up. From there, just enable the Compatibility Mode option and start osu!.
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