In my brand new car with all the computerized stuff, if I disconnect and reconnect the battery, do I have to reset the computer?

I have a brand new, 2017 Honda CR-V EX. It has a bunch of computerized stuff that I old car doesn't have like blind spot monitor, tire pressure monitor, etc.

If I disconnect the battery and reconnect it, do I have to reset any of the computerized stuff? Or can I drive it immediately with no problem?

I don't know about your car… Am thinking you can drive it, but some functions may have to "relearn". Example: on my Ford Mustang, disconnecting the battery causes not only the radio and clocks to lose settings, but also: "driver 1 and driver 2" memory positions for seats, mirrors, steering column… And the windows (they are supposed to lower a bit when you open a door then go back up when you close the door, but need to be reprogramed to do that after an interruption). The transmission is computer controlled and "learns" your driving style. All together there are things I must reset… Must reprogram the windows and it takes about 20 minutes of city driving for the transmission to re-adapt to me. And, of course, the readout for mpg, miles left, miles driven etc. Is zeroed-out.

To avoid all that, you continue some power to the system while the battery is disconnected. In past years, they used a small 9 volt battery gizmo plugged into the cigarette lighter… But now some "power points" are off when the ignition is off… So you can connect a similar device to the battery cables (or use a trickle charger).

You will not have to reset anything except the clock and radio. You will need a 5 digit code in order to make the radio work again. You will then need to reset the radio presets and the clock. The code came with the car and should be on a small card in the owners manual. Other than that the ECU will take care of itself and relearn all it needs to know.

The only thing I'd be concerned about is if the radio has theft deterrent in it and it will lock up if the battery is disconnected until a code is programmed back in.
Disconnecting the battery will make the PCM lose the idle speed programming and if you have drive by wire instead of throttle cable the car may not move and you'll have to tow it to the dealer to have the drive by wire system re-initialized. You shouldn't have to disconnect the battery on a new car anyway.

If it is a 2017, why do you want to disconnect the battery?

Why are you disconnecting the battery? The car is new. Take it to the dealer if the car has any issues. Or read the manual first, every car is different.

I strongly advise against doing anything of this nature. As it will and can destroy certain parts of teh electronics. Especially with a honda so why not ask honda what it is you want fitted to fit it.

This is a question for your salesperson, and most certainly addressed in the Operation Manual. I think you just want people to know you have a brand new Honda CR-V-X. Best advice I can give is never try to fix something that ain't broken, or, more important, don't try to break what works.

Yes, starting in 2015 all cars have a reset button. Open the trunk and take out the spare, you should see a big red button., push it. Be careful because next to it is a yellow button, do not push it! That is the self destruct button.