带有psutil的Python程序在运行PermissionError 8小时后失败：[WinError 5]访问被拒绝-为什么？

我有一个在Windows中运行的使用psutil的Python 3.x程序。该程序的工作很简单-定期检查是否正在运行其他程序。如果找到程序，则不执行任何操作。如果找不到该程序，它将启动该程序。然后程序进入睡眠状态，并再次循环执行相同的操作。这是代码的最低版本：

import psutil, os, time

found = 0

theprogram = 'hiimaprogram.exe'

while True:

    for process in psutil.process_iter():
        if process.name() == theprogram:                   # this is line 14
            found = 1
            print ('process found, doing nothing')
            

    if found == 0:
        print ('process not found, starting the process')
        filepath = theprogram
        os.startfile(filepath)
        
    found = 0

    time.sleep(10)
    print ('sleeping')
    continue

该代码可以很好地完成工作。但是，它有时也会随机失败，永远不会立即消失，通常会在8小时大关出现，尽管有时它会存活更长的时间。这是回溯：

Traceback (most recent call last):
  File "site-packages\psutil\_pswindows.py", line 707, in wrapper
  File "site-packages\psutil\_pswindows.py", line 791, in exe
PermissionError: [WinError 5] Access is denied

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "site-packages\psutil\_pswindows.py", line 782, in name
  File "site-packages\psutil\_pswindows.py", line 709, in wrapper
psutil.AccessDenied: psutil.AccessDenied (pid=31216)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "site-packages\psutil\_pswindows.py", line 707, in wrapper
  File "site-packages\psutil\_pswindows.py", line 784, in name
ProcessLookupError: [Errno 3] No such process

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "programchecker.py", line 14, in <module>
  File "site-packages\psutil\__init__.py", line 731, in name
  File "site-packages\psutil\_pswindows.py", line 709, in wrapper
psutil.NoSuchProcess: psutil.NoSuchProcess process no longer exists (pid=31216)

代码中标记了进程死亡的第14行。对于我来说，编写一个try / except来忽略该错误足够容易，但是我真的很想知道为什么会这样。尝试/除外代码：

while True:

    for process in psutil.process_iter():
        try:
            if process.name() == theprogram:                  # this is line 14
                found = 1
                print ('process found')
        except:
            print ('error')
            time.sleep(100)
            continue

阅读psutil和其他有相同错误（但由于不同原因）的人，我发现适合我的情况是我需要处于管理员模式，但在管理员模式下运行程序似乎没有帮助完全不同，并且仍然显示相同的错误。我想到的另一件事是，由于睡眠/休眠，某些自动Windows进程可能会在八个小时的时间受到干扰，但是我已确保计算机处于“始终开启”的电源方案，其中不应有任何干扰（至少理论上）。任何帮助表示赞赏，谢谢！