It is therefore crucial that these Outlook errors are resolved as soon as possible. This guide discusses methods to quickly fix the Outlook not opening issue in Windows 10. To repair the PST files, you can use the in-built tool ScanPST, which is provided by Microsoft, but it repairs minor corruptions and files up to 2GB only. So you can opt for an automated solution – Kernel for Outlook PST Repair.

In some specific cases, we observed that the problem no longer stayed after deleting the Outlook App Data folder. Thus, you can try deleting the Outlook App Data folder and check whether Outlook functions in your case