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go to C:\Program Files\Blue Coat K9 Web Protectionclick once on licensethen press delete buttongo to http://www.k9webprotection.com/download/k9-webprotection.exethen press runpress nextclick i agreeclick nextgo to http://www1.k9webprotection.com/getk9/index.phpfill the form inthen check your email if you've got the license then copy and paste the license into the installationclick nextthen create your own passwordthen click nextclick installthen it has the part where it says error opening file for writing.....you click ignorethen go to manually reboot latergo to startgo to all programsgo to where it says blue coat k9 web protectiongo to uninstallclick yesthen type the password XXXXX you made beforethen reboot.
Disable the Bluecoat service from the Windows Service Control Manager.
Remove the file bckd.sys under Windows system32 drivers directory.