Hi, it seems that I have same problem described in
(see picture from March 2021 by FK1986) and many other posts.
I've installed iso image with "Windows7 Professional 64bit SP1" downloaded from DELL web for my old Latitude E5530. It contains updates until 2016.
Installation of Total Security was successfull (I had to install SP2 for Win7), but I'm not able to open GUI - there is a message in the window, that my Internet Explorer has to be upgraded. But, there is no newer version and installation of MS Edge did not solve the problem.
Please, can anybody give me recipe how to solve this IE problem or how to skip this step? Maybe some KB helps or .NET version? I spent cca six hours :-( The worst thing is, that there is no information in the window, why Bitdefender thinks that the IE is old :-(