EPERM, operation not permitted error, config store
I solved the problem by just deleting the file at C:\Users\<your username>\.config\configstore\insight-bower.yml, bower will recreate it upon running.
It worked for me to delete the .yml file inside the configstore which was causing the problem. In my case it was "update-notifier-bower.yml", in yours it is probably "insight-yo.yml".
After a reinstallation of bower (npm -g install bower) the file reappeared, but this time it caused no harm.
It has also been reported that the deactivation of the anti-virus software solved the issue.
For me there were three filesat C:\Users\myusername\.config\configstore
(bower-github.yml, insight-bower.json, update-notifier-bower.yml) delted all three
Also disabled the antivirus.
Note: Don't forget to show hidden files.