There is far too many that would show up like that. Now there could be hardware issues so always unplug all USB things prior for a test then read Grif's advice for free scans at http://forums.cnet.com/5208-6142_102-0.html?messageID=3105025
When I open the CONTROL PANEL I can't access any icon because it blinks all the time. The same appeals to a USB DVD ROM drive I have installed on my PC. The window that automatically opens, also blinks on the left side where the directories are shown. Therefore, I have no access to the drive which on the "My Computer" window appears blinking the left side where the directories are shown.