Ryan's answer also helped me with this problem. For archival purposes, here is what I did:
Install the USB driver using the Android SDK Manager:

Find and edit android_winusb.inf according to the instructions http://www.flexjunk.com/2010/05/01/installing-htc-incredible-android-sd-drivers/ . The mine was located in C:\Program Files (x86)\Android\android-sdk\extras\google\usb_driver
Locate the section labeled [Google.NTx86]. At the end of this 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 [Google.NTamd64] section. At the end of this 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
At your Incredible, go to Settings-> Applications-> Development and turn on USB debugging. NOW, you can connect your phone to a PC.
On your PC, open "Start" β "Edit" - "My Computer" β "Management"
You should see a device with a warning βOther-> ADB. Right-click on it and selectβ Update software driver β... Install the drivers manually and specify this in your usb_drivers folder. Ignore any warnings about unsigned drivers, and that's all should install only well. After installation, I see Android Phone-> Android Composite ADB Interface in the device manager.
Ronnie overby
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