I have bought a new pc that came with Norton Internet Security Program Trial Version. I have removed it from my computer but still in the Security Centre the Norton Internet Security is appearing in Windows Firewall and internet options, so it seems to me that it is still not completely removed from my computer. After that I was trying to install the Symantec antivirus corporate edition software but the installation failed and I got the error message ""Error 1920 Service Symantec antiVirus failed to start. Verify that you have sufficient privileges to start system services". I am on the admin account so I wonder what system services are needed to be enabled? Please help.