install two instances of NT on the same computer

[fabian477]

it is possible to install two instances of NT on the same computer and be able to run them simultaneously with a different license and account

[bltdavid]

No, only one instance of NinjaTrader.exe may be running on your PC at a time.

Even if you install it twice, you will not be able to run two instances simultaneously on the same PC.
(It has nothing to do with your license or account settings. The second NinjaTrader.exe checks the
Windows process table, finds another NinjaTrader.exe process running, so the 2nd instance refuses
to execute, giving you an error message just before terminating itself.)

However,
You can install NT7 and NT8 simultaneously and run them both simultaneously, but this is a
special case designed to help users migrate to the newer software. It is noteworthy to consider,
if you have different account settings installed into each of them, you can actually use both NT7
and NT8 to trade simultaneously on the same PC.

[unixes]

Yes you can. You just need a sandbox. In Windows 10 - 11 Pro you have it included, just need to activate it. The only issue with the windows sandbox is will delete everything when you close it. So to keep all is better to use 3rd party software. I run 3 NT8 instances using Sandboxie software.

[bltdavid]

I run 3 NT8 instances using Sandboxie software.

Is each Sandbox running a separate instance of Windows?

[unixes]

Is each Sandbox running a separate instance of Windows?

Yes, separate instances!