The presence of an Anti-Virus client on the guest virtual machine that is being managed by vShield and the Sophos security Virtual Machine (SSVM) can cause lock-ups, poor performance, and other unknown detrimental issues.
First seen in
Sophos Anti-Virus for VMware vShield 1.0.0
What To Do
vShield is intended to be a full replacement for existing client based anti-virus products and therefore they are not designed to co-exist.
All Anti-Virus products must be removed from the guest virtual machines prior to the deployment of the vShield driver and SSVM,
Please follow the removal instructions as per the anti-virus vendors guidelines to remove the guest software. Sophos Anti-Virus removal instructions can be found here.