The 0017 error indicates a download problem. Check the vendor website for the previously installed antivirus software for an uninstall tool. If you have a firewall other than the Windows firewall it must be uninstalled, not disabled. See this Microsoft Knowledge Base article for help with troubleshooting One Care installation issues - http://support.microsoft.com/kb/943906
If you are still unable to install One care after troubleshooting the issue please contact support. How to reach support -