install Windows 7/8 from PC or laptop's internal hard disk on your computer

        Want to install Windows 7 or 8 in your PC or Laptop but you don't have ISO DVD or pendrive or you don't have a system image then don't worry. We have a solution. You just need a Windows 7/8 setup in any drive of your hard disk excepting drive C. Now let us start to know what to do. Snapshots will also help you also.  

Steps to install:- 
(1) First open your PC's control panel and select Action Center and after opening it will look like this.

(2)You can see the recovery option below hit this to open and it will open with options as shown in pic.

(3) Open Advanced Recovery Methods, to extend more features for recovery and it will look alike.

(4)Now choose Use a system image you created earlier to recover your computer (obviously you don't have that) but open it and it will consists option like Backup Up now and Skip. Please now work carefully. If you want to do backup then do otherwise click skip.

Now computer will restart and ask you for path of Image file if you have image then select path and click ok otherwise click to install driver from your PC. All drives will appear. Now go to drive  which consists Windows setup. Right click on Setup and open it as Administrator. The setup will start and use usual option as you do with DVD or Pendrive.

Help this will help you and please give feedback if you have any problem.Click on images to enlarge.
(This not works for Windows XP)