No it should not. what product are you using ?
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For the Trend Micro product, it would not take 6 hours for it to download and install the updates unless the internet connection that you are using is dial-up.
There are diiferent things that could hinder the update process.
-Unstable connection
-proxy settings
-faulty program
-conflicting programs
-malware
There are instances that if you are using an older version of Trend Micro, we suggest to upgrade the version into a higher version.
Just an update, we can try upgrading to the new 2012 version and check if problem persist.
http://esupport.trendmicro.com/solution/en-us/1059195.aspx
***Note: This thread is locked due to inactivity, for similar concerns kindly post a new topic.
