Attempting to install VPN Client 5.0.07.0290 on a WinXP SP3 box. First attempted while logged into machine using AD credentials resulted in the following message:
Error 27850. Unable to manage networking component. Operating system corruption may be preventing installation.
Did a quick search and one discussion indicated that the Windows AD Group Policies may be the problem. Makes sense.
But then I logged into the machine using local account Administrator - same result.