Page Comparison

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1. "Warning: The browser cant be used in virtual machine software such as Virtual PC, VMWare and Parallels."  
   See the Lockdown Browser article for explanation.
   
   
2. "Error Code a4: Update Check Failed:" (on Mac) 
   Another application is blocking access to LockDown Browser or there is an internet connection failure. See the LockDown Browser knowledge base article for explanation and solution. 
   
   
3. "You must close the following program(s) before starting the browser: Google Chrome Remote Desktop (remoting_host.exe)"
   A Google Chrome plugin/extension is actively running in the background. You will need to remove the Google Remote Desktop from your computer. Details on removing the add-on can be found at Google Support here: https://support.google.com/chrome/answer/1649523?hl=en (scroll to the section on "Remove Chrome Remote Desktop"). 
   
   
4. "Update server connection is blocked or not available:" (On PC):
   Security settings or another application is blocking access or that there is an internet connection failure. See the LockDown Browser article for explanation and solution. 
   
   
5. "There is a problem with the settings for this exam:" or "Unable to retrieve settings from the Respondus server"
   If you accessed this through an announcement or notifications link, go to the content area and/or folder within the course that contains the original link to the test. If you still get this error, contact your instructor. They will have to fix an error in the LockDown Browser dashboard.
    
6. "LockDown Browser froze during a test and I cannot exit:"
   A dialog box from another application running in the background "froze" the LockDown Browser screen. See the Lockdown Browser article article for explanation and solution.
   
   
7. "Error Codes: -21, -105, -106 , -111, -118"
   The above error codes indicate a problem with the network, not LockDown Browser. See the LockDown Browser article for explanation and solution.
   
   
8.  Siri detected as running on Mac:
   If Lockdown Browser won't run because it detects Siri, see the LockDown Browser article for explanation and solution.