Archive your emails by year to relieve the PST file.

Save attachments you need to the disk but remove them from the PST.

Delete all unwanted old emails (with bulky attachments).

Find a folder called Larger than 100 Kb.

Remove whatever causes the PST to bloat up If this and the other methods above fail, you have to uninstall and reinstall Outlook/Office.ħ. You can repair Outlook by choosing Change in Apps and features (right click Start and select Apps and Features). If none of the above steps worked, then your Outlook is probably damaged.

Start Outlook, and select the new profile.

Select Prompt for a profile to be used then click OK.

Click Add, enter the name of the new profile.

Your Outlook profile is corrupted? Take a look at this article and learn how to repair it!

Select your new profile from the Always use this profile button.

You can also copy the existing profile and see if it opens:

When the repair is done, restart Outlook.

Follow any prompts from the repair wizard.

Highlight your account, and click Repair.

In the Account Settings dialog box, go to E-mail tab.

Click OK twice when prompted during start-up to create a new PST file.

Save a backup copy of the PST file to safe location or removable storage.

Go to Show hidden files, folders and drives and uncheck Hide extensions for known file types.

If there is more than one PST file, look for the one with the checkmark (default).

Click Control Panel and select Mail to find the PST file.

Click Go, and on the next screen displayed, remove the checkmarks.

Click add in’s and scroll down to Manage.

If Outlook is slow in Safe Mode, then an add-in could be causing the issue.

Type outlook.exe /safe and press Enter.

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