Hey,
To clear the situation: my license finished on 20th February so I decided to remove Bitdefender from my system. I did it the same day. 21th I decided to do rollback of my system (because of other things) to point on day 19th. As it follows, when I did this rollback, Bitdefender appeared again on my system. Unfortunately, it is not responding. When I move mouse over B icon it tells "Bitdefender services are loading now, please wait". last time I checked it was like that for 3 hours straight. When I right click on B icon on taskbar and then select "show", "Update now" or whatever else it doesn't work. When I choose "about" something like this appears(it's the only button that's responding:

That's what is showing on my desktop. Looks like everything is corrupted.
Nothing appears. When I double click on B icon it doesn't work. I went to control system and wanted to uninstall Bitdefender. I right clicked, chose "Uninstall", there appeared loading icon for like 0.5s and then nothing. It didn't work too. So I selected in my menu button "Repair or Uninstall" under Bitdefender folder. When I clicked on it it also didn't work at all.
I restarted computer several times, doesn't help. I think that it's the rollback that caused that.