How to change drive letters....C:\D:\ etc

If u want to change drive letter yet got stuck under conventional method
(Control panel->admin tools-> computer management-> storage-> disk management-> right click on partition ->change drive letter....) because windows won't let you do so
Here's how to,

1. start menu
2. run
3. type regedit(starting registry editor)
4. go to HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices
5. find the drive you want to change the letter
6. right click on that (eg:\DosDevices\F:)
7. select rename
8. change name to what you want(eg:\DosDevices\F: as \DosDevices\D: if D: is what you want to assign)
9. there cant be two drives in same name as you know so you will have to change rest as needed
10. restart the machine

Be careful when u change because it might cause some programmes not to run..

if needed you can run a programme like Power Quests Drive mapper to correct this problem