I've never heard of this before, nor ever seen it; googling around found a similar link
http://social.technet.microsoft.com/Forums/en-US/itprovistadesktopui/thread/d5ab101b-6817-44cc-b43b-f84c0360ef4e/
when the openvpn gui launches it will want to get elevated privileges; it seems that this can cause problems sometimes with older display drivers. It is NOT an OpenVPN issue.