Easiest Way to Delete an Operating System among Two or More

First of all, if you do not know which hard disk drive is having which operating system, then you can get it from here-

Step 1> Go to the Control Panel and select Administrative Tools.

Step 2> Select System Configuration.

Step 3> Now in the System Configuration Window, go to the Boot tab, you can see all the Operating System with their corresponding hard disk drive.

Delete Operating System-

Step 1> Go to the My Computer.

Step 2> Right click on the hard disk drive which is having Operating System that you want to delete and select Format.

Step 3> Check box the Quick Format and then click on Start.

Step 4> Now, go to the Control Panel and select Administrative Tools.

Step 5> Select System Configuration.

Step 6> In the Boot tab.

Step 7> Select the hard disk drive which you have formatted before and click on Delete.

Here, you can also set Default Operating System and the time out of Operating Systems which appears on the screen at booting time.