Recently when I start Nvidia Geforce Experience, my OS (windows 10 64bit) pops up a dialog to warn me that this program wants to access my private keys.
I've had just a little previous experience with this dialog: If I want to export a private email signing key, the OS would warn me like that.
But why does Geforce Experience want to access the private key store?
Edit:
OK, I found a cert under Certificates - Local Computer -> Personal -> Certificates, there's a self-signed cert issued to/by "NVIDIA GameStream Server", which is an untrustred CA Root cert (but it's installed under "Personal certificates") with all purposes enabled (such as code-signing, Microsoft Trust List Signing, Windows Update...)
If you have Geforce Experience installed, may you please check whether you also have this cert on your computer? If not then I probably should change all my bank password from a new device...