The installation of the GIMP on a Windows system is very straight forward. However I do remember an issue which arose a few months ago when a friend of mine decided (was persuaded) to try the GIMP. He was becoming frustrated that every time he double clicked on an image file, the image would open in his old editing application and not in his brand spanking new GIMP installation, exactly the same thing happened with my first GIMP install.
This happens because unlike many other applications the GIMP does not steal file associations when you install it. However there are two simple ways around this.
Method 1: (Custom Install)
1. Double click on the Gimp Install file (get it at www.gimp.org) and the select Run. Select Next at the Welcome screen and Next again at the License Agreement screen.
2. At the Ready to Install screen select Customize
3. I usually leave the Installation Destination at the default and select Next. On the Select Components screen I normally leave it at the default again and select Next.
4. And here is where it gets interesting, on the Select File Associations screen scroll down and select all the file types you want to have associated with the GIMP. At the very least you will probably want to select .JPG and .TIFF but see for yourself as you may have other file types on your computer wish you would like to associate with the GIMP. When your done select Next”.
5. At the Select Start Menu Folder screen select Next and at the Select Additional Tasks screen select Next.
6. This bring you to the Ready to Install screen, select Install here and watch it run. JPG’s and any other file types you selected earlier will now open in the GIMP.
Method 2: (Set File Associations in Windows)
If you have already installed and GIMP you can either run the install again, this time selecting the Custom Install as outlined above or you can set the file associations in Windows, to do this.
1. Open Windows Explorer and from the Tools drop down menu select Folder Options…
2. Go to the File Types tab scroll down the list to. JPG and select Change then select “Gimp-2.6” and select OK. If “Gimp-2.6” is not listed select Browse to locate the file Gimp-2.6.exe manually, it is usually located in C:\Program Files\GIMP-2.0\bin\Gimp-2.6.exe
3. Repeat the last step to add any other file types you wish to associate with GIMP and select “Close” to finish. GIMP will now be the default editing application for the file types you selected.