Hello! I have been using sandboxie for a while to open multiple instances of the same applications, usually up to 15-20 windows. Now that I start to get random stutters, freezes and delays, something I believe is instability in the program itself, I am looking for alternative, better programs to perform this task. I know it´s likely not a hardare issue since I use 4.2 ghz 5930k processor and it´s not been improved since a CPU upgrade. Any free or paid program which could perform "multiple application instances" excellently would be very appreciated. Thank you all for taking your time.