Many people are frustrated by the fact that they have to download different ISOs of Windows 7 to install/upgrade. But there is a simple solution. In fact only one ISO can be used to install any version of Windows 7. You need Windows 7 iso, one DVD and a program called Ultra ISO.

 

1. Make a copy of your .iso for safe keeping..

2. Open the .iso in ultraISO

3. Browse to the "sources" folder

4. Remove the file "ei.cfg". You don't have to know whats there in it, but if you do want to see then this is the snapshot of the file opened in Notepad.

5. Save the .iso

6. Burn it on DVD (Ultra ISO can do this or you can use isoburner or Nero etc)

7. Boot from this DVD and now when you install you will get a choice of home basic, home premium, business, or ultimate