Problem in updating avg antivirus
Each of my test lab servers took between 20 and 30 minutes to upgrade, but your performance will no doubt vary.
Paul is a Microsoft MVP for Office Servers and Services.
I confirmed that my internet connection is working fine as I was able to go to google and look for search results.
The next step was to open these website with browsers such as IE, Firefox and Chrome.
There were no error messages and the web page comes with an option to click on diagnostic tools to find the cause.
For an example of how to do this with Windows NLB see the following article: For other load balancers refer to your vendor documentation for how to take servers out of the load balanced array for maintenance and updates.
I admit I was concerned when I read the release notes for Exchange 2010 SP3 that state: The database schema has been updated in Exchange 2010 SP3.
The logic is to check if it as a browser related problem.
All my web browsers had the same issue which confirmed, this is not a browser problem.