This is the very first time that we're seeing this kind of issue , Could be your settings prior to antivirus and etc , We highly recommend to not use windows 11 for gaming as it is not reliable.I have tried uninstalling and reinstalling Dota2, but Dota2 still cannot function properly. I tried reinstalling Steam again and found that Steam cannot be uninstalled. Is there a solution? If it doesn't work, I can only restore the computer to its factory settings.