Hi
@BillS1,
1. Start your Windows virtual machine -> click on Start and type in the "Search" box "cmd" -> on the top of the list please right click on the "Command prompt" and choose run as administrator (for more information please see the screenshot in the attachment)
2. In the Command prompt window please type the following command:
sfc /scannow and hit Enter.
3. Once the system scanning finished please provide us with the results (make a screenshot of the Command Prompt message)
4. Close Command Prompt
5. Click on Start -> type "msconfig" in the search field and press the Enter key.
6. In the General tab -> Select "Selective startup"
7. In the "System configuration" window go to "Startup" tab and uncheck all applications, except 'parallels'-word contained then click "Apply".
8. After the previous step, open the "Services" tab and enable the option "Hide all Microsoft services" -> and then disable all the non-microsoft services, except 'parallels'-word contained.
9. Click on "Apply" and "OK" -> restart your virtual machine and check the issue.