What’s olk.exe (Microsoft Outlook)? Is it safe or a virus?

Olk.exe is a file associated with Microsoft Outlook, a popular email and personal information management program. The olk.exe file is commonly found in the Outlook installation directory and is responsible for the storage and management of temporary files used by Outlook.

In 2022 Microsoft released a new version of Outlook. Since Outlook is such a critical part of Office for most people, Microsoft didn't force an update to the new version right away. Instead they added a switch in the old Outlook user interface that said "New Outlook" that could be switched on when the user is ready to use the new version.

When the Outlook user turns this switch on, then olk.exe is launched because it's related to the newer version of Outlook, and the management of its files.

It can be confusing to suddenly find strangely named processes running in the Windows Task Manager, like olk.exe. That's why we made our SpyShelter software.

Our app keeps track of changes to different Windows executables, so when a new unusual process appears on your PC, you can immediately know if it's safe. SpyShelter also has "insights" on all the different executables on your PC, so you can immediately read what the executable does whenever a new .exe appears.

To try SpyShelter for free click "download" at the top right of this page. You'll then be able to keep track of hidden changes by executables that you won't be aware of otherwise.

Many IT professionals use SpyShelter to keep track of changes to their PCs and servers, and to stop threats before they can launch.

Researched by Carl @ SpyShelter Labs