Try the given below methods to resolve Cannot Start Microsoft Outlook. Cannot open the outlook window. The set of folders cannot be opened issue:
Method 1:
Try opening Outlook in safe mode and check. Follow the steps:
1. Press “Windows” Key + “R” (combine)
2. Type “Outlook.exe /safe” (leave a space after Outlook) >> Click on “OK” button.
If you are able to open Microsoft Outlook in safe mode without any error, refer the following steps on how to disable the add-ins from Outlook:
1. Open “Microsoft Outlook”.
2. Go to “File” tab >> “Options” >> “Add-Ins”.
3. Select “Com Add-ins” >> Click on “GO”.
4. Uncheck the available Add-ins >> Click on “OK” button.
Once the keys you have deleted the add-ins keys, Open Outlook and check if it works fine.
Method 2:
If the above steps do not resolve the issue, then try creating a new profile in Outlook if and check if it is working. Refer the link on How to create a new profile:
https://support.microsoft.com/en-us/kb/829918
Method 3:
Last but not the least Inbox Repair Tool (scanpst.exe), you should run scanpst.exe utility to repair minor level corruption.
Method 4:
Check if Outlook is running in compatibility mode.
Compatibility mode is designed to help a program run on an older operating system. If Outlook is running in compatibility mode, you can turn that off and see if it fixes the problem.
Method 5
Remove the Outlook Profile: https://support.microsoft.com/en-us/kb/829918
and exectue an Office Repair: https://support.office.com/en-us/article/Repair-an-Office-application-7821d4b6-7c1d-4205-aa0e-a6b40c5bb88b
Note:
There is also an informative article on Cannot Start Microsoft Outlook while searching over the internet about your occurred issue.