Can you point me to the right one to buy? Like Amazon link or something like that. I would really appreciate

It won't let me. It says I can't install an older software

I tried tinspirecx_4.4.0.532.tco and tinspirecx_4.5.2.8.tco
Both did the same thing.

I kept on holding every time the calculator restart. I got to a screen with the clock but it would restart again and it would say no operation system

I tried this couple times. But it doesn't work it would say no operation system found and I would install the normal os but after it reboot it give the same message and it will be stuck again with loading screen.

Yes it disappears but the screen is stuck on the loading screen with "x" inside a red circle.

followed the instructions to make the ti nspire cx to cas. Now the calculator is showing me a message saying "this calculator has been modified to enable CAS functionality...." I tried [esc]+[menu]+[-] and rest. It would reboot and show a message that the operation system is not found. I t...