It is useless to restart and reinstall the Dropbox in win7.

Dropbox cannot be started. I have been entangled for more than two weeks ~

Sometimes, half of the installation fails to be reinstalled.

Sometimes the installation can only be started once the next day.

An error is prompted when the dropbox.exe. log file is opened in the dropboxinstallation directory:

Traceback (most recent call last):
  File "dropbox.py", line 71, in <module>
  File "zipextimporter.pyc", line 82, in load_module
  File "arch\__init__.pyc", line 5, in <module>
  File "zipextimporter.pyc", line 82, in load_module
  File "arch\win32\constants.pyc", line 5, in <module>
  File "zipextimporter.pyc", line 82, in load_module
  File "arch\win32\internal.pyc", line 26, in <module>
  File "zipextimporter.pyc", line 82, in load_module
  File "comtypes\client\__init__.pyc", line 22, in <module>
  File "zipextimporter.pyc", line 82, in load_module
  File "comtypes\client\_generate.pyc", line 18, in <module>
  File "os.pyc", line 433, in __getitem__
KeyError: 'PATH'

 

Solution:

Right-click my computer and choose Properties> advanced> environment variable> path to % SystemRoot % \ system32 \ WBEM.

I noticed the log file of the installation directory today.

Then the last two sentences are Google:

File "os.pyc", line 433, in __getitem__ KeyError: 'PATH'

Http://forums.dropbox.com/topic.php? Id = 26467 here we can see that this person has solved the problem and

Go to http://www.tomshardware.co.uk/forum/76182-35-path-missing-environmental-variableshere

Then I see the answer.

Archived from groups: microsoft.public.windowsxp.help_and_support (More info?)

I've found out that this PATH variable should be there and to put it in by 
carrying out the following procedure: 

1. Click Start > Settings > Control Panel, and double-click System. 

2. Click the Advanced tab. 

3. Click Environment Variables. 

4. Click New, type PATH in the Variable Name box. 

5. Type or copy/paste the following text in the Variable Value box: 

%systemroot%\system32;%systemroot%;%systemroot%\system32\wbem 

I did it and it works. 

Q: Why is path empty?

***************** ***

After performing the preceding steps

Dropbox icon on the desktop

Dropbox in the installation directory

Drag the root directory icon to the taskbar

Start

The above Dropbox can be started

==========================

360 The software assistant cannot be started ~