[rzawora]

I have been running Windows 7 since the day they released the beta to public. I remember when I first plugged the phone in WMDC didn't detect the phone properly. I disconnected it and put the CD in that came from Verizon and installed the HTC drivers...after this WMDC did connect.
On the other hand...when I first attempted to upgrade to the official VZW WM6.1 upgrade a week or so ago, I did run into a little trouble...seems like the computer needed different drivers to do this process. Basically the first attempt failed b/c Windows 7 was taking awhile to install the correct drivers. I left the phone plugged in, exited the ROM installer, waited for the device to be fully configured, and then re-ran the program. It successfully flashed the device. Hope this helps with what you're having trouble with. Prob just need to install the HTC drivers first. The WMDC software was included with the beta release of Windows 7, at least on mine it was.