PC not getting virus defs. Gives 'error 8921, 252 unable to connect to network proxy server.' We have 98 other PCs that are updating fine but a handful are not. I uninstalled Symantec Cloud Endpoint Protection SBE, used the 2 wipe tools to remove it completely from PC, reinstalled Symantec Cloud Endpoint Protection SBE, and am still getting the same error. Can anyone help? None of the forums I looked at helped.