In order to provide VPN pivot functionality on the Windows platform, Metasploit Pro must install a new network driver. The driver,
msftap.sys, creates four virtual interfaces on the installed system, which provides the ability to run up to four concurrent VPN Pivot sessions.
If Metasploit Pro does not locate the virtual interfaces when MetasploitProSvc starts, Metasploit Pro automatically installs the network drivers. To reinstall or uninstall these drivers, you can use one of the batch scripts that are available. You can locate the batch scripts at:
$INSTALLROOT\apps\pro\data\drivers\<arch>\. You can use the scripts to disable the VPN Pivot virtual interfaces or restore a previously removed driver.