Hi,
Thanks for your post in Microsoft Community.
I understand that you are having issues with Lenovo Active Capacity Pen 1 no longer working after upgrading to Windows 11.
We searched Lenovo's official website based on your question. We found that the driver for Active Pen is no longer updated, and the supported OS list given by the official website is only Windows 10.
We initially suspect that the driver for Windows 10 is not compatible with Windows 11. That is to say, this pen may not work on Windows 11 at present.
Here is the driver link we found for the pen for the Yoga 720-13IKB: Active Pen Driver for Windows 10 (64-bit)
Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate and safe information. Watch out for ads on the site that may advertise products frequently classified as PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
You can check whether this computer model is the same as your device. If it matches your device model, then you can try to reinstall the driver to see if it can be resolved.
If reinstalling the drivers doesn't fix it, then that means the pen won't work on the Yoga 720 running Windows 11.
You may need to go back to Windows 10 to use the pen if necessary.
Please feel free to let me know how it goes.
Kirk | Microsoft Community Support Specialist
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