As of two days ago, not a single computer can detect my flash drive, I am using a sandisk cruzer micro 4gb. The light turns on in the flash drive letting me know there is power but no computer can detect it. I don't get the alert from windows that a usb device was connected. I go to my computer and its not there. I go to device manager and its also not there. This happened after I tried to install the u3 software on it, but it failed. After that no computer has been able to detect. How can I reformat it or fix it if no computer can detect it.