Hi Sue, I tried this solutions too... 🙁

On my server there aren't the three security updates installed....

As I said, I used all workaround found on the net and a I used all solutions that microsoft gives on forum and on technet.

Nothing woks.

All microsoft bulletin/forums says to uninstall these two security updates KB2966827 and 296688 but on my server I haven't theese...

windows server 2012 R2

I've done it.

I also tried to force the net framework 3.5 using the dism command and so on, but nothing, it didn't install

OK,I understand.

Thank's a lot.

I don't understand why physical core....... If I have other services on this server I reduce their performance, isn't it?

But we use server also for other services. If I reduce the core from bios, may I compromise the performance of my server? I thought I can reduce the core...

yes

I mean reducing the number of core sql uses