Go to Control Panel then Add/Remove Programs (XP) or Programs (Vista and Windows 7) and remove all anti-virus / anti-malware software. Windows Firewall must be turned OFF:
Click on Start.
Click on Control Panel.
Click on Windows Firewall.
Click on Off.
Click OK to save your changes.
Vista/Windows 7 users must turn User Account Controls OFF:
Enter your Knox e-mail username and password when prompted.
Single click on Win-Sophos9_Install.exe.
Click Save to save the file on your machine.
Close your browser.
Find and double click the dowloaded file.
Click Install.
The installation program will now automatically run. A black window may open. The actions of the program will show and the installation process will move along.
When the program initially starts running, there may appear to be a delay of a few minutes as the program scans the PC and removes other antivirus software.
Once the program has completed the install, a shield icon should appear in the Taskbar. The icon may flash for a short time while updates are applied from the central servers. Once complete, the icon should be light blue in color.