If you are using Windows 7, you might be already aware that if you want to use custom themes, then you need to patch system files. We have also covered on how to install custom themes on Windows7. Seven Theme Source Patcher is a freeware portable tool which allows you to patch system files easily so that you can install custom themes on Windows 7. The application also takes a back up of your system files, so that you can revert back anytime.
The patcher will back up the original (current) system files, and patch your Windows 7 with a resource pack. Modifications can include icons, bitmaps, cursors, visual style, Start button, side panel, logon screen, sounds, fonts, task manager colors, copy animation colors, etc.
You can select Logon Screen, side panel and also Start Orb for customizing. The program also offers option to create a restore point. The application shows a preview of the theme before installing. The tool is compatible only with Windows 7.