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If prompted to allow Outlook to make changes to your computer, select Yes. When Outlook is not responding and refuses to close, it becomes necessary to use the Task Manager to close it. Follow the steps below on how to use Task Manager to force quit Outlook. I am in the middle of a conversation with an important client, I am close to sealing a sweet deal and as I am about to send the email, Outlook freezes!  
  
Note that the above link is for desktop Outlook for Windows. A more general version that can also fix Office, Microsoft 365, and other Outlook problems can be found here. If I run an online repair and reboot her PC it will usually work for a day or two. Kinda at a loss at this point, I am thinking about wiping the PC and starting again. Outlook is one of the most complex applications of the Microsoft Office suite, which makes it extremely resource-hungry. Outlook may hang simply because it does not have enough memory to run or perform a required operation.  
  
The instructions given in the error will seldom actually fix this issue as the issue is more likely to be caused by the add-in itself, rather then by an Outlook installation issue. If Outlook works in Outlook Safe Mode but resetting your dat-files did not help, https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html then the issue is most likely caused by an add-in. We’ll start off this guide with 3 easy questions. Depending on the answers, you could possibly skip large portions of this guide or even directly get a solution to your startup issue.  
  
If you decide you don't want the calendar you created, right-click the calendar and select Remove. Under Calendars, My calendar is the default selection and displays the calendar in Month view. You can move forward or backward through calendar months using the arrows above the calendar. To show or hide the Folders list, select Show or Hide the navigation pane.  
  
If you have email messages in an email program, you must import your email messages and addresses to the new user profile before you delete the old profile. If everything is working correctly, you can now delete the old profile. To create a user profile, you must first create a user account.  
  
When you install Outlook, an Inbox repair tool (scanpst.exe) is also installed on your PC. The Inbox repair tool can resolve problems by scanning your Outlook data files, and repairing errors. To use the Inbox repair tool, exit Outlook, and then follow the steps in Repair Outlook Data Files (.pst and .ost). As your mailbox size increases, more resources are required https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html to open each folder.  
  
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. Be aware that you may need your product key if you received one. To keep up with new viruses as they're created, antivirus software vendors periodically provide updates that you can download from the Internet. Download the latest updates by visiting your antivirus software vendor's website. Your profile stores a variety of settings that control how Outlook looks and feels.  
  
In the first place, check whether your antivirus is up-to-date. Reliable and trusted antivirus software vendors do care about compatibility with Microsoft Office applications, so there is https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html a good chance that the issue is fixed in their latest update. If the above does not help, turn off the antivirus and see if it brings Outlook back to life.  
  
We love reading your suggestions on new features and feedback about how you use our products! To learn more about how to share your feedback, see How do I give feedback on Microsoft https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html Office. If you're still unable to send or receive email, read how to Fix Outlook.com email sync issues.  
  
If it is then you have to wait till they resolve the issue. Then follow other solutions to fix Outlook web not working. So, there are several factors that cause the Outlook web access issue. To resolve that there are several solutions you can use, some common ones are mentioned in this flowchart. Outlook Web App or OWA is a web version of Microsoft Outlook that you can use for free. Because it is available online, users can easily access their account from any device, even from their smartphone.  
  
So, if I tried to open a message, search my inbox, write a new email, go to the calendar, etc., it would freeze up for about 5-10 seconds at a time. The freezing never seemed to occur when I had Outlook open but was not using it. For a list of antivirus software vendors, see Consumer antivirus software providers for Windows. Outlook stores certain data, such as email signatures and the spelling checker dictionary, in the AppData folder. If the network is performing slowly, Outlook https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html must wait for read and write operations to the AppData directory to finish.  
  
Download the Outlook Diagnostics Tool from Microsoft"s official website and run it. Launch it and it will automatically scan and attempt to fix the issues. V. Next, clear all the checkboxes in the list and then click on the OK button to save your settings. Some programs running in the background of your computer may conflict with Outlook and cause it to crash. You could try restarting your computer and then reopening Outlook to see if it runs correctly. Click the Archive this folder and all subfolders option, and select the folder you want to archive. You could create a new profile in Outlook when faced with "not responding errors" A new profile is also advised when you upgrade to a newer version of Outlook.