Unload a device

Unload a device

I made a device driver. But my system crashed at the moment when it was
deleting the device object. I think the symbolic link was deleted and it
crashed after it was trying to delete the device as I can't see the
symbolic link in the Global. How do I delete this device now. It also
gives me a error popup(system cannot find the file specified
Device\Mydriver) when I try to open the listed Mydriver under devices from
Winobj.
I tried starting the driver's service again. I do get a handle back when
opening the service. But it wont start now. giving the error value of
Cannot find the file specified. I was working fine, i mean starting the
driver before this crash.
I am a beginner with drivers and doing this to learn, please guide.