Atco, you don't say which version of Windows you are running?? Try this anyway:
Open Explorer,
Select 'View', then 'Folder Options'
Click on the 'File Types' tab and scroll down until you get to 'bitmap image' and then select it.
Click the 'Edit' button, then 'Edit' again. This will give you a box, 'Editing Action For Type: Bitmap Image'. Make an exact note of what it says in this box as a backup.
If you are using Windows 95/98 or Me, type the following into the box (Note : Don't leave a space between the colon and the slash. I have had to because if you put them both together here you get
!!!!!!!!!!!!!!!!)
"C: \PROGRA~1\ACCESS~1\MSPAINT.EXE" "%1"
This should get you back to the Windows standard paint package, this won't give you a great deal of scope for editing pics. Try and get a copy of Paint Shop Pro or something. It should be fairly easy to get your head around.
Hope this helps!!!!