All was working fine. But suddenly one day, my modem UT300R2U statred doing some strange activity.The PC/USB light on the modem started blinking continously and connection failed. it happened again and again.but strange thing is when i close the explorer.exe all lights remains steady and net started working. Now i cannot accesss the net until i close the explorer.exe from the task manager.what is the actual problem and what steps i shoud take. Is it modem prob or line prob or some virus has affected my PC. Please give me with a good solution