Hi, so for a number of months I have been using my Arduino and everything has been fine. But today I was uploading a program (using a motor shield and external power supply) and it worked fine last night and for about an hour today, then I went to upload another program and it would no longer detect the device. I have checked all the COM ports and I know it is not the cable as I can connect my friends mega just fine. The “L heart beat” still works and as far as I am aware that means my bootloader is still working but the computer no longer makes the sound when I plug it in or out anymore.
Any ideas on what might be going wrong?
Time is of the essence for me and any help will be greatly appreciated.
Edit: I have done many hours of googling and this is the last resort and It does not work on both windows 7 or 10.