You need to tell more.
Since I needed to reformat and reinstalled W7 74bit my physical drives have been allocated different drive letters which isn't too big a problem and I have fixed up that problem.
HOWEVER every time I look at all the storage devices (clicking on the COMPUTER icon) there is listed under DEVICES AND REMOVABLE STORAGE 'Removable Disk (M:)' and if I double click on it I am prompted to 'Please insert a disk into Removable Disk (M:)'. And if I insert say a usb memory stick into any usb port nothing happens.
When I go to Disk Management (tool) it is not listed BUT 'system reserved' is listed - is this the same? If so can I change the drive letter?
Is there a way to remove this phantom removable disk?