Admittedly, I did a really dumb thing.
I installed 1.8.6 in a wrong folder, and then, instead of uninstalling, I deleted the folder. Then I deleted the ininstall.exe file (please dont’t ask me why). Now when I try to install again, Windows tells me Arduino is already installed, and when I tried to uninstall through Windows it tells me it’s not installed.
I already did a search for “arduino” on all the computer and I don’t think there aren’t any more files or folders. I also searched the string “arduino” on regedit and there’s nothing.
I’m at the end of my rope. Can anyone help me?