SEP 12.1 RU4 MP1b - Upgrade Issues - Network Adpaters

Hi Everyone,

My upgrade to 12.1.4112.4156 seems to have hit another snag. On some of the PCs when the new symantec client is deployed and upon the reboot the install appears to interfere with the network adpaters. The users are not able to access the network. When I check, with ipconfig there are no adpaters listed. Uninstall the SEP client, reinstall and it works. Any ideas?