Impossible to install Adobe AIR 22 Beta or latest regular release

Dear Community,

for the very first time in my life I'm experiencing serious problems when trying to install on a MicroSoft Windows 7 SP 1 Ultimate fully patched (at May 24th, 2016) the latest regular or beta releases of Adobe AIR.

I tried to install them from the Admin user with Admin privileges: I got the reply I should contact the Admin (?)

Then, I entered the Windows in Secure mode, from the Admin user with Admin privileges and got the same reply.

Sincerely I don't know what else I should do in order to have the Adobe AIR installed on that Windows.

Previously I had to use the GWX Control Panel to avoid Windows 10 be installed over Windows 7 (that laptop didnt support Windows 8.1 so I dont wanna try with Windows 10); is it possible that the GWX software has somehow modified some Windows DLL blocking me from installing Adobe AIR?

I had no problems at all installing the latest beta release of Flash Player.

Waiting for some answer I remain.

Yours sincerely.