I want to run and debug my Android apps on my HTC Incredible. On http://developer.android.com/guide/developing/device.html it says I have to install the Windows USB drive
Ryan's answer helped me with this problem, too. For archival purposes, here's what I did:
Install the USB Driver using Android SDK Manager:

Find and edit android_winusb.inf following the instructions from http://www.flexjunk.com/2010/05/01/installing-htc-incredible-android-sd-drivers/. Mine was located at C:\Program Files (x86)\Android\android-sdk\extras\google\usb_driver
Find the section labeled [Google.NTx86]. At the end of that section, add the following lines.
;
;HTC Incredible
%SingleAdbInterface% = USB_Install, USB\VID_0BB4&PID_0C9E
%CompositeAdbInterface% = USB_Install, USB\VID_0BB4&PID_0C9E&MI_01
Find the section [Google.NTamd64]. At the end of that section, add the following lines.
;
;HTC Incredible
%SingleAdbInterface% = USB_Install, USB\VID_0BB4&PID_0C9E
%CompositeAdbInterface% = USB_Install, USB\VID_0BB4&PID_0C9E&MI_01
On your Incredible, go to Settings->Applications->Development and turn on USB debugging. NOW, you can connect your phone to the PC.
On your PC, Go to Start->Right-Click My Computer->Manage
You should see a device with a warning on it called Other->ADB. Right-click it and choose Update Driver Software… Install the drivers manually and point that to your usb_drivers folder. Ignore any warnings about unsigned drivers and everything should install just fine. After installation, I see Android Phone->Android Composite ADB Interface in the Device Manager.