Background
I recently used skimage for image processing and found an error when quoting
ImportError: DLL load failed while importing _rolling_ball_cy: The specified module could not be found.

Environment
Windows 10
Python 3.9

Solution
The system is missing the C++ Redistributable dll, download and install it.
https://download.visualstudio.microsoft.com/download/pr/2250605e-e48f-43ed-ba6e-e0cc18bc530d/A9F5D2EAF67BF0DB0178B6552A71C523C707DF0E2CC66C06BFBC08BDC53387E7/VC_redist.x64.exe
Then Restart the computer