Re: Ext HDD not recognised by Windows
I am glad you found the problem.
However, if you have a network drive (to another computer) Windows will sometimes assign external storage devices to the same drive letter. This often happens when connecting cameras!
If you suspect this, right-click on Computer (Windows 7) or My Computer, and select Manage. Next, select Disk Management. You can then see all connected storage devices, both internal and external, and can change their drive letters if you need to.
Nigel CRIPN and Bar
Beware of the Dark Slide