Dropbox won't start on my Windows 10 computer

 This worked for me, maybe it will work for other people as well. The original post in the Microsoft forums is here:

https://answers.microsoft.com/en-us/windows/forum/all/windows-10-apps-wont-launch-after-anniversary/051a25d0-1842-4b2b-bd6d-6d7d8baf8a41

Here's a breakdown of what "Rolando Vil" told the users there to try. After running these instructions, things started miraculously working for me again. Mind you, I did not have to run the last instruction (6) for it to start working. Now Dropbox and all of my other apps are working fine. I have always mantained that this is a Windows issue, not a Dropbox issue per se. I hope that this helps someone else.

Here's the breakdown:

To repair the damaged Windows files. Do the following steps:

1. Right-click the Start button and select Command Prompt (Admin) OR hit the "Windows" key, type "Command prompt" and when it shows up in the search, right-click on it and select "Run as administrator."

2. At the prompt, type Dism /online /cleanup-image /restorehealth

    If you're not familiar with DOS commands, please note the spaces before the "slash" ( / ) on each command. There is no space after.

3. If the DISM command reports problems that cannot be fixed, stop here. There may be a memory or hard drive issue. Windows needs to be Reset to repair the damage.

4. At the Command prompt, run this command next:

Sfc /scannow

5. Again, if problems are reported that cannot be fixed, stop here. There may be a memory or hard drive issue. Windows needs to be Reset to repair the damage.

6. Run these two commands next:

PowerShell -ExecutionPolicy Unrestricted

and

Get-AppXPackage -AllUsers |Where-Object {$_.InstallLocation -like "*SystemApps*"} | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

Watch out for red errors, this could indicate a problem which cannot be repaired. If you see errors. Windows needs to be reset to repair it.

Thanks Jane - Unfortunetly there does not appear to be any specialists working on this. Nobody reached out to us. No support person has helped us. We received an email from Dropbox asking us  "how we did" however nothing at all was done. Last we heard form someone was 2-3 weeks ago and it was the same advice we've been getting to uninstall and reinstall. 

We are currently in the process of planning a migration to OneDrive and plan to close our DB account. I am shocked at the lack of support ability for a business account and saddened to have to take our business elsewhere over this. Its been two months f back and forth! 

Okay that sounds good, thank you!

I appreciate your speedy reply here cvbdfb; please have a look at your inbox at your earliest convenience & we’ll take it from there!