Starting Outlook in Safe Mode from the Start Menu in Windows 7.

This guide explains all you need to know about that in order to get your Outlook to start without errors again.

Note: Aside from solving problems with starting Outlook, this guide can also be used as a base to troubleshoot other common Outlook issues.

Windows 10 Upgrade: If you are having difficulties with starting Outlook after you upgraded to Windows 10, see the guide: Windows 10 and Outlook and more specifically the section PST File access is denied.

Depending on the answers, you could possibly skip large portions of this guide or even directly get a solution to your startup issue.

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Is Outlook up-to-date Did Outlook ever work Does Outlook still work for other users on the computer Safe Mode Cannot open the Outlook window Reset dat-files Disable add-ins Use scanpst.exe to fix Outlook Data File errors Recreate your mail profile Run a Repair, Office Diagnostics or reinstall OfficeOutlook Check the Event Viewer and post in the Outlook forum for further help Is Outlook up-to-date Just to make sure you are not trying to troubleshoot an issue which has already been solved, make sure that before you begin you have installed all updates for your version of Outlook.

For instance, Outlook 2007 and Outlook 2010 have known compatibility issues with Windows 10 which can be fixed by installing their latest Service Packs and updates.

Fixes for known issues and bugs in Outlook are released on a monthly basis.

Solution: Use Microsoft Update to install the latest updates for both Windows and Office.

Make sure that you have Microsoft Update configured to also check for Office updates or check the Update Options setting when using an Office 365 installation.

Did it ever work Did Outlook still work correctly the last time you used it If so, you probably can skip this solution.

If it never worked before or if you are starting Outlook for the very first time, it could very well be that you have not configured your mail account correctly.

A common mistake is choosing for an Exchange account while in fact you are using a POP3 or IMAP account.

Solution: At this point, it is often easiest to recreate your mail profile via the Mail applet in Control Panel.

When recreating the mail profile, make sure youre using the correct server settings provided by your ISP or corporate email administrator.

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An overview of the settings from some of the largest free email account providers can be found here.

Does Outlook still work for other users on the computer If you share this computer with another user, you can ask this other user to logon and ask to verify if Outlook is still working for him or her.

If you are the only user of this computer, then you could also add another user to Windows just for testing purposes via the User Accounts applet in Control Panel or the Accounts section in the Settings app on Windows 10.

Solution: If it doesnt work for another user on the computer either, then the issue is most likely caused by a faulty add-in or a damaged OutlookOffice installation.

If it works for another user on the computer or you have no way to check this, continue to the next step in this guide.

Safe Mode If Outlook worked correctly the last time and nothing has changed about your account configuration, then checking if things work correctly in Safe Mode is a good first step.

Starting Outlook in Safe Mode will prevent some or all add-ins from being loaded, prevents several settings files from being loaded and turns off the Reading Pane.

To start Outlook in Safe Mode youll need to start Outlook with the safe switch; Windows 7 Start- type; outlook.exe safe Windows 8 Start Screen- type; outlook.exe safe (just start typing, a search box will automatically become visible) Windows 10 Start- type; outlook.exe safe (just start typing, a search box will automatically become visible or type in the command in the Cortana Search box) All Windows versions Hold the CTRL button when clicking on the Outlook button to start it.

When typing, please note the space between outlook.exe and safe.

For alternative methods of starting Outlook in Safe Mode see this Quick Tip.

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