I created a scheduled task that runs at startup to fix the minimum requirement for CPU everytime you logon to your PC. It updates your CPU to be an "Intel(R) Core(TM) i7-4770K CPU @ 3.90GHz" which is above the minimum. I did this because there is no way to disable the message and it is HIGHLY annoying since I have a 3770K overclocked which is pound for pound a superior processor to the i5 minimum. Alternatively if you don't feel comfortable with a task you can just grab the Two.bat file below and run it instead (as admin of course). I've provided these at a paste site so you can see the source for yourself and decide if it is safe to run. Make sure when you save these pastes to just save the contents, not the webpage (that would be silly). The task that this creates runs as NT Authority by the way.
1) Save this http://pastebin.com/JwUxfMvy as One.bat on your homedrive (usually C:)
2) Save this http://pastebin.com/q8DJdQaQ as Two.bat on your homedrive (usually C:)
3) Save this http://pastebin.com/dGKviHtH as OculusTask.xml on your homedrive (usually C:)
Once that is done all you need to do is right-click on One.bat, run
it as Administrator and it will do all the magic for you, and now
every-time you login to your PC (with any account) an administrator task
will execute the fix, thus permanent.
If you are curious to see how it looks on my PC check out this screenshot: http://i.imgur.com/VFOyroS.jpg
Good luck and see you in the Rift!
EDIT: Had to update the pastes, they expired/self-deleted. Using paste-bin this time so maybe they will stay longer.