Windows 7/vista Process Management - How To Start An External Program After Long Idle Time?

This is a follow-up to that question. Basically, i have a python script which should start another program (.exe) via a timer after some 2-6 hours. Everything works fine as long as

Solution 1:

After taking account the problem stated in Here, I think a viable alternative would be to use many short pauses instead of a long pause, so the program is always active, but may result in higher memory usage.

def wait(sec,sleeptime = 0):
    import time
    endsecs = time.time() + sec
    while True:
        if endsecs <= time.time():
            return None
        if sleeptime != 0:
            time.sleep(sleeptime)

Just a guess, nothing certain, no time to verify.