From 6c31532f7c9d3e54aa13e730e52273985a7688f1 Mon Sep 17 00:00:00 2001 From: Judson Franco Date: Sun, 18 Jan 2026 17:32:56 +0800 Subject: [PATCH] Add My Outlook 365 won't open after a Windows update yesterday Microsoft Q&A --- ...indows-update-yesterday-Microsoft-Q%26A.md | 41 +++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 My-Outlook-365-won%27t-open-after-a-Windows-update-yesterday-Microsoft-Q%26A.md diff --git a/My-Outlook-365-won%27t-open-after-a-Windows-update-yesterday-Microsoft-Q%26A.md b/My-Outlook-365-won%27t-open-after-a-Windows-update-yesterday-Microsoft-Q%26A.md new file mode 100644 index 0000000..5a41b13 --- /dev/null +++ b/My-Outlook-365-won%27t-open-after-a-Windows-update-yesterday-Microsoft-Q%26A.md @@ -0,0 +1,41 @@ +Content
+ + + +After updating Office, you may experience a brief flashing window every hour, which triggers the OfficeBackgroundHandlerRegistration task to start running. For more information about when builds are available for their respective channels, go to Update history for Microsoft 365. We're investigating the issue and will update this page when a fix is available. MAPI does not validate that a provider's DLL that it is requested to load is registered correctly in MapiSVC.inf or even that it comes from the local machine. This can be exploited by creating a file together with an OLE object in such a way to cause MAPI to load a DLL from a network share when the OLE object is activated. + + + +My Outlook 365 won't open after a Windows update yesterday. + + + +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. If so, wait a short time (usually two or three minutes) to see if Outlook starts working again. If you can't choose any of the menu options, type inside an email message, calendar event, or contact, Outlook may have frozen. There are three steps you can take to try to get Outlook working again. + +Outlook Known issues in June 2022 updates + +The issues documented in this section have been reported after installing the recent updates listed below. We're investigating the issues and will update this page when a fix is available. In the meantime, please use the workarounds suggested for each issue. If you manually type in the secondary connected account email address in the "From" field, the email is sent as "On behalf of" your primary Outlook.com account. + +Outlook Known Issues in June 2021 updates + + + +The loading of unregistered MAPI services has been disabled by default to make Outlook more secure. Currently, you can't use Outlook on Windows to edit calendars that are shared with your Outlook.com account, even if you've reconnected your Outlook.com account to Outlook. We're working to make it possible to edit shared calendars in Outlook 2016 for Windows. We've run into some issues with the 'New' Outlook this week after 6+ months of usage that other may run into. + +Some Web-based Outlook add-ins don't work in when using on premise Exchange 2013 + +Online Repair reinstalls Outlook components while preserving your data, resolving DLL and registry mismatches that prevent startup.Outlook 2016 freezes when you try to preview an Excel file that's attached to an email.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.You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in Outlook.com as additional accounts in the Outlook profile.We're investigating the issue and will update this page when a fix is available. + +My computer (running Windows 11 Pro) forced an update about two weeks ago. Since the update, my Outlook will not return to "new" Outlook, it deleted my email signature, and is incredibly delayed in getting messages. I am opening the "classic" Outlook app on my computer because the one labeled new seems to not actually be a functioning app (no icon, nothing happens when I click on it). When the Outlook app opens, I can see the 'Try [modern authentication troubleshooting](https://customerscomm.com/read-blog/115885_11-tips-to-fix-outlook-error-0x800ccc0e-easily-2025.html) the new Outlook' toggle. The toggle just turns back off and the app does nothing different. + + + +This occurs because custom form script is now disabled by default. For persistent issues, use FixTechGuide’s automated tools to perform deep diagnostics and security checks. Stay updated, back up regularly, and enjoy uninterrupted productivity in your Outlook workspace. Online Repair reinstalls Outlook [FixTechGuide email error solutions](https://get2knowgod.com/read-blog/617_outlook-inbox-not-updating-with-new-emails-reasons-and-fixes.html) components while preserving your data, resolving DLL and registry mismatches that prevent startup. This process checks for structural issues and automatically fixes them. + +Getting Started Is Easy + +Many users encounter startup freezes, profile loading loops, and crashes following major Windows patches or Office updates. Fortunately, most of these errors stem from configuration conflicts, corrupted data files, or outdated components that can be fixed with a few targeted steps. If your Outlook suddenly stopped opening after a Windows update, don’t panic. + +Repair Outlook OST File Not Working in Office 365 – Complete Fix ( + +This ensures Outlook and Windows run the same DLL versions and registry references. Third-party add-ins are among the most common culprits for [solve Office 365 mailbox sync delays](https://gitlab.mpeeo.com:443/emiliobrune341/5984228/-/issues/3) Outlook not opening properly. Safe Mode allows you to start Outlook with all extensions temporarily disabled. \ No newline at end of file