Upgrade to Microsoft Edge to Outlook not opening on Windows 10 take advantage of the latest features, security updates, and technical support. The settings in the Send/Receive Group windows let you customize the synchronization rate of the new group. To investigate any reported issues, dashboard filters, and drill-down investigations can be used to narrow the focus and take remedial action. Since the repaired PST file has no errors or inconsistencies, Outlook should perform well and run stable and fast. An upgraded hardware should improve Outlook performance considerably.

If you're still unable to send or receive email, read how to Fix Outlook.com email sync issues. Some customers may experience a delay when trying to create a new email address, or alias, for their Outlook.com account. None of the events or information was lost in the move to the new calendar.

If it does not, proceed to the next solution. If the Outlook issue "outlook keeps crashing Windows 10" persists. You can proceed with the methods on this list. Once PSTs start climbing past 2 GB, things get shaky. Outlook slows down, crashes randomly, or fails to load entirely. Users often Outlook not opening on Windows 10 turn to Microsoft’s ScanPST tool, but it struggles with large files and doesn’t always finish the job.

Try enabling both of the following options, then restart Outlook. Please install the latest updates on your phone to resolve the issue. Until you can install the Windows Update fix release, you can set a registry key that will cause Outlook to stop using the local Windows Search service. When this registry key is set, Outlook will use its own built-in search engine.

Set Outlook to save attachments for 999 days.You won’t have to wait for Outlook to re-download attachments every time it access the email. Most likely, your Windows is running 64-bit with Office 32-bit. Use the Office 64-bit release, if supported by your organisation. On Windows, you have a couple of ways to speed up the Outlook desktop app. For immediately speeding up Outlook to be effective and enhancing its long-term performance, Clean Email provides the following benefits.

Find solutions to common problems or get help from a support agent. Starting Outlook in safe mode, which starts Outlook without add-ins loaded, can tell you if an add-in is the source of the problem. We go above and beyond the average software reseller because we built our business on trust. As active members in the IT community, we work to support our clients’ businesses and provide them with peace of mind.

ProcedureExit Outlook.Open a Run dialog box. ...Type Outlook /safe, and then click OK.If the issue is fixed, click Options on the File menu, and then click Add-Ins.Select COM Add-ins, and then click Go.Click to clear all the check boxes in the list, and then click OK.Restart Outlook.Jun 25, 2025

📌 You can enjoy the same seamless functionality, including advanced filtering and sorting options, across the web, desktop (for Mac), and mobile on both Outlook not opening on Windows 10 Android and iOS. Organize your mailbox to make it faster in just a few clicks. Trend information is displayed on a line chart to help track improvements over time to see if any taken actions have been effective.

For more in-depth investigations, you can rely on the results of specific data-gathering remote actions. This page will guide you through the structure of the content and how it can be used. Once done, check if the Outlook performance issue is resolved. Check whether the Outlook is running slow problem is resolved. So yes, 2 minute delays are normal in Outlook desktop as the network architecture is completely different than Outlook mobile, as @rod-it ​ laid out. Outlook desktop is obviously a much more robust client as well, so there can be a few seconds attributed to processing at the client end.

If you upgraded from Outlook 2003 to Outlook 2007, some people have reported that reseting a few internal Outlook files helps with performance. Microsoft has identified several issues with a recent Outlook updated (KB ). To access the filtering options faster, add them to your Quick Access Toolbar. The loading of unregistered MAPI services has been disabled by default to make Outlook more secure. When you try to accept a shared Outlook.com calendar using your Microsoft 365 for business account in Outlook 2016, you might receive the "Something went wrong" error or your sign-in might fail.

To repair Outlook not opening on Windows 10 such PST files, you need to use Stellar Repair for Outlook, an advanced Outlook PST repair tool. This tool can repair damaged, inaccessible, and encrypted PST files with complete integrity and precision, regardless of the file size or the degree of corruption. The tool creates a backup of the original PST file (.bak extension) and then tries to repair the original PST file. The time taken by it to repair depends on the level of corruption, inconsistencies, or errors, and size of the mailbox.

If the self-help doesn't solve your problem, scroll down to Still need help? Switch your alias to an Outlook.com or Hotmail.com account. Customers using the contact support buttons at the foot of the support pages, or the "email us" links in support Virtual Agent, are unable to open the Help Pane. Check that you have not accidentally blocked the Gmail domain when blocking one Gmail user. Connect with experts, discuss the latest Outlook news and best practices, and read our blog.