- Restart your system
- do NOT (I repeat, DO NOT) run Ableton in Administrator mode, deselect the administrator launch mode
- do not run in compatibility mode either
Probably more than I care to really help you because you have been playing the same fiddle about Ableton for 9 years
I had the same issue as you with files not able to be dragged into live from Windows just this week, again, and could not drag MP3 or WAV into Live (just get a "not allowed" icon). After a few minutes of research I found that (against my own judgement) Live should NOT be run as an admin and UAC can create issues with the priorities given to the user for drag and drop so switch it off completely (search UAC in the windows search then set slider to the bottom). I could almost guarantee I could fix your issue via Teamviewer but not something I would want to get myself rolled up in there...
You really need to keep in mind the issue you are having is more than likely an issue with Windows and your access settings and not Live. Someone of your age should have learned by now how to keep a lid on your emotions and surely if you are a programmer, and had any actual sense to see the forum is not filled with people that have your same issue that it's not specifically a Live issue. Yes people have had this issue, i've had it twice now, but in all cases it's an OS permission issue, not Live
As most people have echoed, Ableton's support and contact is actually pretty damn good and I can certainly not agree with anything you say