First, download and RUN ShowPlay setup program.
Download

Next, choose below

1. It started ok!

   Now adjust ShowPlay to your liking.

2. Cannot start setup

   Fix Windows useless:
   “...isn't commonly downloaded”

3. Cannot see setup at all

   Fix “Download blocked” and similar nuisances.

4. Error during installation

   Fix “Access denied”, “Cannot write”, “Bad antivirus”, etc.

5. Contact support

   Other issues.

 

All these are mostly Windows problems.
Unrelated to ShowPlay itself.