Rollback Attack Signatures

Check the Signature Update Details section to see what signature files version you had before the last update. Download and install the particular signature files version. You can temporarily put your Policy to Transparent mode to mitigate the negative impact.

You can also restore previous version of security policy, doing so will retain the signature files update you installed, but removes any links between the new signatures and your security policies. This option might be sutiable aswell, unless you have over a hundred policies.