The following are important for the power calculator power toy to run successfully in windows 7:
- The file pcalc.exe needs to run in compatibility mode for windows XP. This can be set by right clicking the file pcalc.exe in windows explorer and click "Properties" of the context menu. Then click on the button near the bottom "Change settings for all userse" and check the compatility mode as shown below. Click OK to save the changes.
- The file pcalc.exe can not reside in windows\system32 folder. I found windows folder or other folders should work.