Installation on 2012 R2 and MSCS very slow

Hi,

I'm try to install a new system from an R3load export of our productive ECC into a new MSCS based on Windows 2012 R2. Our ERP is 6.05 SP16 with Kernel 7.21 SP 300.

The installing, first node... into input session is very slow, several hours from start to this point there are 12 hours...

Have you got any idea?

Thank you so much.