Installing windows 7 over existing Windows 7

5:00 AM

I installed the Windows 7 Ultimate Edition over the existing Windows 7 Tweaked Gamer edition which had a lot of bugs and minor issues here and there.

5:30 AM

Not able to delete the Windows.old and Windows.old000 folder which were automatically created, due to some issue with access permissions. Moreover there is a huge clutter of folders in the C: which are now of no use. These folders were not removed during the install and Windows is not allowing me to delete them now.

http://www.geckoandfly.com/5864/force-delete-locked-or-undeletable-files-and-folder-in-windows-7/

http://ccollomb.free.fr/unlocker/#download

5:40 AM

I guess I’ll format C: and again install a fresh copy of windows through USB into it to clean up all the clutter. zzZZ…

6:15 AM

Done. Laptop is as good as new .

Installing Windows 7 from USB stick

 

The shortest and simplest way :

Download Windows 7 USB/DVD Tool

 

Fix for the error :

“The selected file is not a valid ISO file. Please select a valid ISO file and try again.”

is as follows :

• Open your .iso file in Power-ISO(full version if .iso > 300 MB)
• Go to File–>Image properties
• Check UDF
• Press ok
• Save your file

Now use the Windows 7 USB/DVD tool!!

 

No need to open command prompt at all .

Other method :

http://www.intowindows.com/how-to-create-bootable-windows-7-usb-to-install-windows-7-from-usb-flash-drive-using-windows-7-dvdusb-tool/  [However this above method didn’t work out well using virtual  drives (win-7 .iso mounted on Power-ISO). ]