A small FYI, Windows XP users who run certain Kaspersky antivirus software may find themselves offline after downloading a new update. Released yesterday, the update causes Windows XP computers to lose their connection to the Internet. IT administrators who use Kaspersky Endpoint Security at their organizations chimed into the Kaspersky forum yesterday and today complaining of connectivity problems. One person who manages around 12,000 computers with KES installed noted a slew of calls to the help desk from users knocked offline.
Some IT admins said they were able to restore Internet access by shutting down the monitoring of certain ports or disabling the product's Web Anti-Virus component reports Techamok. But those were deemed temporary solutions at best. Kaspersky did eventually acknowledge the problem, announcing a fix to the buggy update and offering a resolution:
We apologize for the inconvenience. It does appear that there was a hiccup with an update pushed out causing Windows XP machines to lose Internet connectivity. An update was just released that should address the issue, what I will need you to do is:
To get XP users Internet connectivity (temporarily), please disable the Web AV component of your protection policy for your managed computers. After doing so;
In Security Center (or Admin Kit):
1) Go to the Repositories section >> (Right click) Updates >> All Tasks >> Clear updates repository.
2) Go to the Repositories section >> (Right click) Updates >> Download Updates
After taking this step, please run your group update task for Managed Computers. After the update has been pushed to your workstations, please re-enable your Web AV component in your protection policy. This should resolve the issue.