Have a vista business on dell latitude xt. Was trying Cisco VPN Client (5.0.03.0530) and having problem connect thorough ZTE wireless modem (vista hung). Then i installed SP1 and KB952876 patch provided bu Cisco and reinstalled Cisco VPN Client (5.0.03.0560), and have error 442 on every connection. Then i was trying to manually uninstall Deterministic Network Enhancer and ended up not able to install cisco vpn anymore - something like network configuration lock is is held bu another application. I think better solution is to reinstall to WinXP tablet...