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Internet Explorer DNS Cache Timeout
Since Internet Explorer 4.0, the DNS cache has been resetting itself every thirty minutes.
In order to change the setting, you need to start regedit.exe by typing it in a "Run.." window.
Go to the following registry key :
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet
Settings\DnsCacheTimeout
The value in this key represents the interval between DNS resets, in seconds.
This tweak is listed in the network category. See all tweaks or click one of the latest tweaks listed below: