Error installing V3

I had the same problem. Error installing phone after a Windows XP
repair so couldn't charge my phone via USB port.

Did some searching and found this, which worked for me
:
:
My guess is that running "repair install" from the XP CD borked the
KMDF coinstaller, like many obscure actions do. Here's what I would
do:

1) Remove the driver package using Add/Remove programs control panel

2) Delete anything that's left over in C:\Program Files\Common Files
\Motorola Shared\MotPCSDrivers\...

3) Download the drivers again from Motorola but don't install them yet
(better to have the original CD, which I did)

Then....delete:

4) System32\WdfCoInstaller01005.dll

5) System32\drivers\wdf01000.sys and ...\wdfldr.sys

.....and in the registry:

6) All of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Wdf

7) All of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es
\Wdf01000

Then reboot, then reinstall the driver package and choose "Clean +
Reinstall" manually from the driver installer (Start -> Programs -
> ...) (or install mobile Phone Tools from CD)

Then plug in the phone again.