If GPU remains used after PL is closed, this means there’s still a program using it, or an issue in AMD drivers. I invite you to update your graphics drivers if not already done, or ask help from AMD support. Please note however that the issue that you describe looks similar to the one users are getting with AMD RX 580, see this thread for more information.
Thanks for the information. I’m using the latest driver already, but in the thread you mention I see that an old driver may fix the problem. I will try that!
With regards of the 100% GPU issue. It only occurs when I start PL5 (although I never checked with the trail version of PL4). If I boot my computer, start PL5, do some work in PL5 and close PL5, the GPU remains 100%. No other programs were used. I will have a look if this issue is also solved with the older driver version.
I invite you to check Windows processor requirements Windows 11 supported Intel processors | Microsoft Docs. The requirement is on the generation (year) of the processor rather than i3 or i7. What will most likely force users to upgrade hardware is missing TPM 2.0 support (in many cases you just need to enable it on your motherboard though).
Although completely irrelevant for this thread, the i5-6400 does support TPM2.0, but simply isn’t supported by Microsoft. Quite a shame in my humble opinion but Windows 10 is still supported until October 2025. By then, my machine will be really old and probably already replaced 