Changing the Framework version requires a restart of the W3SVC service. Alternatively, you can change the Framework version ...

Changing the Framework version requires a restart of the W3SVC service. Alternatively, you can change the Framework version without restarting the W3SVC service by running: aspnet_regiis.exe -norestart -s IIS-Viirtual-Path
Do you want to continue (this will change the Framework version and restart the W3SVC service)?