Hi,
I have same problem and after a long struggle, i solved in a simple way.
No registry edit, no uninstall and reinstall , no updating drivers etc etc
I have tried few suggestions in this forum but didn't work for me.
Here is a simple solution, what wrong with this issue was a file name corruption of "nvspcap.dll"
When i looked in to "programme files" and all folders of Nvidia>Nvidia shadowplay> i found that the file "NVSPCAP.dll" was renamed to
"_NVSPCAP.dll'
So i re-edited the name and removed the "_", That solved the error problem.
Try if it helps you.