title: Anaconda Navigator won't open
body: <p>I've accidentally changed my windows 10 user account into non-administrative account, then tried to launch anaconda navigator using the icon not the anaconda prompt and it said I don't have admin permissions, I got everything back to where it was (means that my user account is an admin account) but the navigator still won't launch, and this error is shown :</p>
  
  <blockquote>
    <p>An unexpected error occurred on Navigator start-up</p>
  
  <pre><code>Main Error 'root_prefix' Traceback  (most recent call last):    File "C:\Anaconda\lib\site-packages\anaconda_navigator\exceptions.py",
  </code></pre>
    
    <p>line 75, in exception_handler  return_value = func(*args, **kwargs)<br>
    File "C:\Anaconda\lib\site-packages\anaconda_navigator\app\start.py",
    line 151, in start_app window = run_app(splash)    File
    "C:\Anaconda\lib\site-packages\anaconda_navigator\app\start.py", line
    65, in run_app window = MainWindow(splash=splash, tab_project=False)<br>
    File
    "C:\Anaconda\lib\site-packages\anaconda_navigator\widgets\main_window.py",
    line 168, in <strong>init</strong> self.api = AnacondaAPI()</p>
    
    <p>File
    "C:\Anaconda\lib\site-packages\anaconda_navigator\api\anaconda_api.py",
    line 2337, in AnacondaAPI ANACONDA_API = _AnacondaAPI()    File
    "C:\Anaconda\lib\site-packages\anaconda_navigator\api\anaconda_api.py",
    line 89, in <strong>init</strong> self._conda_api = CondaAPI()    File
    "C:\Anaconda\lib\site-packages\anaconda_navigator\api\conda_api.py",
    line 1767, in CondaAPI CONDA_API = _CondaAPI()    File
    "C:\Anaconda\lib\site-packages\anaconda_navigator\api\conda_api.py",
    line 350, in <strong>init</strong> self.set_conda_prefix(info=get_conda_info())<br>
    File
    "C:\Anaconda\lib\site-packages\anaconda_navigator\api\conda_api.py",
    line 505, in set_conda_prefix self.ROOT_PREFIX = info['root_prefix']</p>
  </blockquote>
  
  <p>any one has any idea how to solve it ? it runs on the anaconda propmt thought.
  I tried change the shortcut target but it didn't work
  Using the last version on Anconda and Windows 10</p>
  
  <p>edit : 
  when I launch it from anaconda prompt it launches put display these errors:
  edit, when it opens from anaconda prompt it displays those errors:</p>
  
  <blockquote>
    <p>ERROR download_api._download:234 Invalid url
    <a href="https://www.anaconda.com/api/videos" rel="nofollow noreferrer">https://www.anaconda.com/api/videos</a></p>
    
    <p>2019-02-22 20:36:48,227 - ERROR download_api._download:234 Invalid url
    <a href="https://www.anaconda.com/api/webinars" rel="nofollow noreferrer">https://www.anaconda.com/api/webinars</a></p>
    
    <p>2019-02-22 20:36:48,551 - ERROR download_api._download:234 Invalid url
    <a href="https://www.anaconda.com/api/events" rel="nofollow noreferrer">https://www.anaconda.com/api/events</a></p>
  </blockquote>
  
  <p>and when I launch Jupiter, it doesn't launch</p>