If you are trying to use this tool to extend a trial indefinitely, be aware that Microsoft typically only allows you to "rearm" Office a limited number of times (usually 5). If you need a long-term free solution, you can use Microsoft 365 for the Web for free in your browser. specific error code you're seeing when trying to run this file?

tool. Its main job is to reset the "grace period" (timer) for Microsoft Office trial installations. IT professionals use it when building computer images to ensure that when a new user starts Office for the first time, their trial period starts from day one. Microsoft Learn Where to Find It (No Download Needed)

Sometimes a simple Windows Update will patch errors related to the Software Protection Platform. A Note on "Free Trials"

Searching for a "free download" of ospprearm.exe can be tricky because it is not a standalone app you typically download. It is a built-in utility that comes with Microsoft Office. Microsoft Learn

Note: Replace "Office16" with your version (e.g., Office15 for Office 2013). What if it’s missing or broken?

If you are getting errors like "ospprearm.exe is missing" or "stopped working," a manual download from a random website is not recommended