Hello,
Sorry to hear you are having issues. I don't think that has anything to do with Start11. First does this happen all the time or only when you playing games. Look like something is pulling your mouse to its default pointer. I see this happen specially with games that come with own mouse pointer. You can try uninstall Start11 and see if the issue still happening.
Thank you.
Basj,
Stardock Community Assistant.
