In
I mistakenly set mspaint as the program to open .jpg files. Can I
change it?
I have XP professional, all updates & SPs
Using Windows Explorer, navigate to a JPG, right click it, select "Open
With ...", then select "Choose Program...". Check the "Always use the
selected program ..." box and pick a program from the list or "Browse"
to the one you want.
Many image viewing apps have an option to make themselves the default
viewer. For example, in IrfanView (
http://www.irfanview.net/), it's in
Options->Set file associations.