This has become incredibly frustrating.
I have removed Opera, deleted every file I can find that's anything to do with opera, reinstalled with the latest version, and afterwards can open Opera maybe once. After closing it, waiting a minute, then opening again... it won't work and I get the "lack sufficient privileges" popup. I am the administrator, and I can't resolve this.
What's going on? Why do I not have the necessary privileges to open my own profile???
This was an occasional problem usually resolved with a reboot, and maybe related to the Microsoft "antivirus" - but now it's become impossible to overcome.
How do I completely remove Opera and all its traces so a clean install can (hopefully) restore usability???