This document describes a workaround for users facing installation error while installing AnyConnect Client on Windows 7 (64 bit).
User is tryying to install AnyConnect Secure Mobility Client 3.0.3054 on my PC (Windows 7 professional and he get the following errors.
Failed to install AnyConnect Secure Mobility Client 3.0.3054 with installer error: Fatal error during installation. A VPN connection cannot be established.The acsock service failed to start due to the following error:A device attached to the system is not functioning.
The workaround is mentioned below:
Make sure that PC is clean(free from zero access rootkit before trying this fixes). This firewall issue is commonly found on vista and windows 7 (64 BIT OS). It is recommended to contact malware removal forums to remove it first and try the fix