Check if a process is running (Windows)

tasklist /nh /fi "imagename eq notepad.exe" | findstr /i "notepad.exe" >nul && (echo Notepad is running)|| (Echo Notepad is not running)
There are many ways to do it on *nix. But on Windows, it's a bit convoluted. I use the above command expression in a batch file to check if a process is running already before running it again. I use this is a batch file I created to switch between 2 different versions of PowerBuilder (PB). I wanted to make sure, one version of PB is not running, before letting the user to switch, hence this check. (replace notepad.exe with PB125.exe above). /nh means no header, /fi means filter. We are filtering for Notepad.exe only above. Then, we take that and look for Notepad.exe using a FindStr command. It will still work, even if we don't have those 2 flags, but it makes finding the right program quicker. && and || are part of the conditional expressions see here: http://www.robvanderwoude.com/condexec.php. We use these to print for the IF...ELSE condition. >nul is the equivalent of Unix /dev/null Rest is self explanatory, I think.
Sample Output
Notepad is running

0
2014-08-22 00:52:19

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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