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Update of Windows defender-KB915597


After the update of one of the windows defender KB915597 definition update, Vista internet securtiy has come up with a certain malware,trojan in my laptop which are not detected by avast and its not allowing me to browse any sites saying its a possible threat and asking me purchase the full version of Vista security . I dont want to purchase this.I tried System restore, but still I face this alert message. Now I am posting this message via office system.

The vista service pack 2 installation is also getting failed, don't know if its related to the above update.

Please provide a solution.


Staff member
Vista Guru
Gold Member
Try going back a month in system restore. You may not have gone back far enough, or the malware is in SR, too.

The update and malware is just a conincidence.