Despite uninstalling and reinstalling it does not start. System Windows 10 pro. I have had this problem several times in the past few weeks. Sometimes a reinstallation has helped, sometimes not. What could be the reason?
We understand that encountering technical issues can be frustrating. I hope the suggestions shared by Monika helped resolve the problem. If not, kindly try running Illustrator under a different administrator account (Windows) and check if it helps.