how to change, add, or remove a drive letter

To change, add, or remove a drive letter

1. Open Computer Management by clicking the Start button, clicking Control Panel, clicking System and Security, clicking Administrative Tools, and then double-clicking Computer Management. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.

2. In the left pane, click Disk Management.

3. Right-click the drive that you want to change, and then click Change Drive Letter and Paths.

4. Do one of the following:

o To assign a drive letter if one has not already been assigned, click Add, click the letter that you want to use, and then click OK.

o To change a drive letter, click Change, click Assign the following drive letter, click the letter that you want to use, and then click OK.

o To remove a drive letter, click Remove, and then click Yes to confirm that you want to remove it.

Laptop is not Shutting down?
When you shut down or restart your Laptop, it's not working? Need to press Power Button to shut down?

Then follow the steps:

1. Go to "Control Panel".
2. Enter "Power Options"
3. Click on "Choose what the power buttons do" from left.
4. Click on "Change settings that are currently unavailable" from upper side