I made a post a few weeks back suggesting not to unroot the Incredible by using the downgrade video but with some recent posts I have noticed some did not read it.
With the new Slcd's out if you downgrade to 2.1 to unroot you will be left with a black screen and a device rendered less then usable.
This post will show the correct way to unroot the device. It is already posted on AF, XDA, my blog and on Incredileforums.com. No excuses of "I didn't see it"
How to Unroot Correctly
First step is to get s-on. Download this file and flash through clockwork recovery.(Note s-on does not work on radio 2.15.00.09.01. If you have radio 2.15.00.09.01 please flash this http://static.droidnetwork.net/dpist...5.00.07.28.zip through Hboot first.)
Now that you have s-on you can now flash the 2.2 RUU with Hboot. To do this you must have your sd formatted to FAT32. Place the file below on the root of your sd card after you renamed it to PB31IMG. (Root means not in any folders) Then boot into hboot. To boot into Hboot power off the device and reboot it while pressing the vol- and the power at the same time. The phone will then look for the file and ask if you would like to accept it. Select yes and then leave the phone alone until it asks you if you would like to reboot. Select yes and enjoy you stock phone.
If you are having troubles getting it to flash through hboot you can also do the RUU. You'll need the newest version of HTC sync though. It can be found here: HTC Mobile Phone Support - DROID INCREDIBLE by HTC (Verizon) - Downloads
Once that is installed you can download and run this RUU: