Steps to reproduce:

1. Follow host wizard
2. try to use scripts provided:
3. 

Result:

Example given make leftover script in Windows/system32 folder if start PowerShell with Admin writes
Example script doesn't care about results of the execution, while it can really check using zabbix_get or any other method... also while another copy of the Agent installed.
Example script doesn't add 127.0.0.1 to the Server list, making most debug/troubleshooting cases with zabbix_get from same machine not workable until configuration is changed