Fix for GIMP.EXE "This application failed to start because libgdk-0.dll was not found"

On my microsoft WindowsXP (5.1: Service Pack 2) PC libgdk-0.dll exists but was in C:/lib/ I copied it and 7 other .DLL files from C:/lib/ to C:/windows/system/ then gimp succeeded in running when I double clicked on a .xbm file. (At various points gimp appeared to enter a CPU hogging loop when I double clicked before I had copied all the .DLL it wanted to C:/windows/system/.)

Simon says:
Sounds like what you actually needed to do was add c:\lib to your PATH

Environment variables can be set somewhere like control panel -> system -> advanced -> environment (not sure if this is exactly right but it's something like that)