Posted 27 March 2012 - 05:05 PM
Sorry, I forgot to add info that I installed all necessary drivers from original vendor's CDs, and checked the relavant drivers again. No yellow or red marks on device manager. Tried couple times HP & Logitech installation trouble shooting instructions. But, I'm still thinking the problem is withe USB or relevant drivers. Because, during the setup when "CONNECT DEVICE TO COMPUTER" was instructed (I do) but no "NEW DEVICE FOUND" balloon appears on the screen and the setup stalls. I'm looking forward to your advices.