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Does Outlook work on Windows 7, 8 or Windows 10?

Manufacturers and retailers often offer the current version of Office with the purchase of a new computer, sometimes with a discount. Should you purchase the new version or save your money and keep the old ...

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Using Two-factor authentication in Outlook

I thought I wrote about this a few weeks ago, right after Microsoft introduced two-step authentication at Outlook.com but I can't find it, so if it's a duplicate, sorry. :) Two-factor (or two-step) authentication is ...

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How to find folder paths in Outlook mailboxes

We get a lot of questions asking how to search for folders or get folder paths in Outlook. Unfortunately, it's not possible to search for folders and when you search for contents of a folder, ...

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Configuring an Outlook.com account in Outlook

Outlook.com replaced Hotmail recently. It's been around awhile, used for Live@Edu accounts (student accounts at some universities). It's a Hotmail / Live account with an OWA interface. Because Outlook.com is essentially a Hotmail account, you ...

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How to start Outlook in safe mode

When something isn't working right with Outlook we often tell users to start Outlook in safe mode or using the /safe switch. This loads Outlook without many of the customization files and add-ins loaded. If ...

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How to use Scanpst.exe to repair Outlook data files

Scanpst (aka the Inbox Repair tool) is found in your Office installation folders, usually C:Program FilesMicrosoft OfficeOfficeXX, where XX is your version of Office. In Vista and Windows 7 64-bit, the folder is C:Program ...

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Latest Tip

Email Attachments Won’t Open After Upgrading to Windows 10 (Fixed)

This specific issue was fixed in the August 19 2015 Product Update.

After upgrading to Windows 10, some users are having problems opening Office documents that are attached to Outlook messages. When they try to open the attachments, they receive an error message that there is an error or the file is corrupt.

Excel: "This file is corrupt and cannot be opened"
Word: "Word experienced an error trying to open the file"
PowerPoint: "The application was unable to start correctly", "PowerPoint found a problem with <filename>", "Sorry, PowerPoint can’t read <filename>"

The files are not corrupted but there are issues with the file permissions after the upgrade that affect opening the files in Protected View. Protected View is enabled by default when opening file attachments in Outlook, files from untrusted locations, or files that were downloaded from the Internet.

While you could disable protected view to fix it, it’s not recommended as it can allow infected documents to run code.

The recommended solution is to fix the file permissions, or run Office's Online Repair.

To fix the file permissions:

  1. Right click on the Start button and choose Command Prompt (Admin)
    Right click on Start to locate commands
  2. Copy icacls "%programfiles%\Microsoft Office 15" /grant *S-1-15-2-1:(OI)(CI)RX
  3. Right click in the command prompt window and choose Paste.
  4. Press Enter to run the command.

If you are unable to fix the file permissions, you’ll need to do an Online Repair of your Office installation from Control Panel, Program and Features. Note that Online Repair can take a long time to complete.