Hello,

Could you please provide us the screenshots of these Errors, please?

OR

Please provide us the exact error message along with the SID Number.

In such case, make sure the OS is updated with the Latest Microsoft Security patches and Service Packs.

Hope that helps!!

is this IPS pop up? did you apply MS patches on the targeted system?

Please post a screenshot or log of exact message

Hello,

Check this:

http://www.symantec.com/security_response/attacksignatures/detail.jsp?asid=23179

Patches for the correct OS architecture are found here:

http://www.securityfocus.com/bid/31874/solution

Defintiely do get those patches applied, and do ensure that IPS is functioning on all SEP clients.  Trying to protect against today's sophisticated threats with AV alone is like fighting with one hand tied behind your back.

Some other excellent advice from Security Response:

http://www.symantec.com/theme.jsp?themeid=stopping_malware&depthpath=0

Reference Thread with similar issue: 

https://www-secure.symantec.com/connect/forums/os-attack-message

Hope that helps!!