If you receive the following error message:

<Kaspersky Anti-virus> is on but is reporting its status to Windows Security Centre in a format that is no longer supported. Use the program's automatic updating feature, or contact the program manufacturer for an updated version"

This is down to a new update from Microsoft being pushed out in anticipation of Windows 7.

The FAQ about this can be found here:

http://support.kaspersky.com/kis2010/error?qid=208280607

http://support.kaspersky.com/faq/?qid=208280158

Or you maybe eligible for a free upgrade to Kaspersky 2010.

www.kaspersky.co.uk/upgrade for more information