Alright for this tut you only need WinRar and ResTuner
*NOTE: ResTuner is not free but its a 30-day trial way more than we need*
First off Run ResTuner as admin. *right click run as admin* (this step is so you can save the new winrar.exe after we make our changes)
Now once your in ResTuner open WinRar.exe (located at c:\program files\winrar\winrar.exe)
Now click Dialog and find REMINDER right click on it and click Delete Resource.
Click the save button and accept the replace.
All done open winrar and say bye to that stupid box, just remember winrar isnt "Free" dont download any cracked version
Btw i wasnt sure on the place to post this, since its kinda a gray area...