Hi, I have 3 usb ports in my laptop. Till last week, I was able to access pen drives using any of the port. Today, when I insert a pen drive in any port, first, my anti-virus (Kaspersky) asks for scan or skip scan, and simultaneously system shows a window stating "There was a problem installing this hardware USB Mass Storage Device.." I click finish and this repeats until I remove the pen drive from the port. I tested whether my port is working fine and attached a mouse, it works fine. I have windows XP with all service pack updates installed. Please help in resolving this.