Blogs
on January 15, 2026
Microsoft Outlook users come various kinds of Outlook error messages and codes while working on it. But there are a few solutions that you can try to fix common Outlook issues and problems. Try Safe Mode, Create a new Profile, Recreating account, ScanPST.exe to repair PST file etc. If they all fail, then go for a reliable software which resolves PST file issues instantly. If Microsoft Outlook error message appears due to PST file issue, then it is quite easy to find the solution I cant start Microsoft Outlook or receive the error Cannot start Microsoft Outlook Cannot open the Outlook Window Description: Oc for it.
If this profile becomes corrupted, it might fail to load or cause Outlook to crash upon opening. Such corruption could result from improper shutdowns, software conflicts, or corrupted files within the profile. Microsoft regulatory releases new updates for Outlook and Windows (or macOS).
Out-of-date software and corrupted Outlook profiles are two I cant start Microsoft Outlook or receive the error Cannot start Microsoft Outlook Cannot open the Outlook Window Description: Oc of the most common issues that can prevent you from sending and receiving email. If you're an admin with multiple users reporting problems, you also should check for service issues with Microsoft 365. Learn how to get more out of your connection with Outlook.com. We've streamlined search to make it easier than ever to find what you're looking for.
After you run any troubleshooter, Get Help provides details on any findings and suggestions for possible remedies. If one of these resolves your problem, close I cant start Microsoft Outlook or receive the error Cannot start Microsoft Outlook Cannot open the Outlook Window Description: Oc the app and continue working. If you can't open Outlook, or Outlook disappears or crashes, one of your add-ins may be to blame or you may need to update Outlook. Under Calendars, My calendar is the default selection and displays the calendar in Month view.
In this article, you will see various Microsoft Outlook error messages and solutions to fix them effortlessly. Most Microsoft Outlook issues occur due to PST file corruption. So the important question is I cant start Microsoft Outlook or receive the error Cannot start Microsoft Outlook Cannot open the Outlook Window Description: Oc how to fix Microsoft Outlook error in a simple and quick way without any data loss. You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in Outlook.com as additional accounts in the Outlook profile.
If you've already clicked the Accept button in Outlook 2016, you won't be able to re-accept the invitation from another Outlook application. The person who sent you the invitation will need to remove your permissions and then send a new invitation. You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in Outlook.com as additional accounts in the Outlook profile. Not something you want to take on lightly, but sometimes you have to. Similar to our earlier suggestion of repairing Office (see #3 Repair Your Microsoft Office above), perform the same steps except choose to Uninstall.
The error message states that there are some issues with Outlook PST files. This error tends to pop-out when you attempt to launch Outlook. Outlook I cant start Microsoft Outlook or receive the error Cannot start Microsoft Outlook Cannot open the Outlook Window Description: Oc simply denies the existence of PST file because the file is corrupt and cannot be accessed anymore. Another reason can be Outlook is set to read-only mode, which stops Outlook from accessing the PST file. To resolve this issue, switch Outlook from read-only mode and try moving your PST file from external drive to hard drive.
While we fix the problem, you can send the file as a OneDrive link. When users select the Manage Microsoft Storage quota link at the bottom corner in Outlook.com, they are taken to a blank Settings page. You can start Outlook in safe mode, disable your add-ins, and then try to open Outlook normally. For more information on creating a new email profile, see Create an Outlook profile. To start Outlook in safe mode, press the Windows I cant start Microsoft Outlook or receive the error Cannot start Microsoft Outlook Cannot open the Outlook Window Description: Oc key on your keyboard. In the search box, type outlook.exe /safe, then press Enter.
For complete information on this error and its solutions, follow our guide on How to resolve the error "0x800CCC13" Outlook cannot connect to Server. When you reinstall Outlook, you are removing the current application from your system and then installing it again. Reinstalling your Outlook client can fix installation errors and common software failures. In case of Outlook crash, re-installing the application is the most recommended method to fix the issue.
To access the calendar shared with your Microsoft 365 for business account, you'll need to accept the invitation from Outlook on the web, iOS, or Android. If you've already clicked the Accept button in Outlook 2016, you won't be able to re-accept the invitation from another Outlook application. The person who sent you the invitation will need to remove your permissions and then send a new invitation. Occasionally, classic Outlook tries to run a process in the background. Auto-archive, sending and receiving a very large attachment, or running some of the other mailbox tools can all be done in the background. Check the status bar at the bottom of the screen to see if another process is running.
In many organizations, Outlook is one of the most common and core programs that are used from day to day. Many businesses depend on it to keep their operations running, and having it break is a nightmare that I cant start Microsoft Outlook or receive the error Cannot start Microsoft Outlook Cannot open the Outlook Window Description: Oc usually ends up costing lots of money and causing a lot of frustration. Fortunately, with the right Outlook troubleshooting strategies, many of the most common Outlook problems are quite straightforward to troubleshoot.