Ospprearmexe Download Verified May 2026

After obtaining the file, verify its digital signature:

You can also check the file hash against a known good version (from a fresh Office VL install):

Example hash for Office 2019 OSPPREARM.EXE (may vary by build):

MD5: 8c3e8a9f4b2d1c6e5f7a9b0c3d4e5f6a
SHA-1: 2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b

⚠️ Hash values change with updates – always rely on the digital signature, not static hashes. ospprearmexe download verified

Open Windows File Explorer and paste one of these paths (depending on your Office architecture and version):

| Office Version | Typical Path | |----------------|---------------| | Office 2016/2019/2021 (64‑bit) | C:\Program Files\Microsoft Office\Office16 | | Office 2016/2019/2021 (32‑bit) | C:\Program Files (x86)\Microsoft Office\Office16 | | Office LTSC 2024 | C:\Program Files\Microsoft Office\Office16 |

Look for ospprearm.exe. If it is missing, your Office edition is Retail (not Volume License). Rearm will not work on Retail editions. After obtaining the file, verify its digital signature:

Microsoft does not offer OSPPREARM.EXE as a standalone download. Instead, download the Office Deployment Tool (ODT) or the original volume license ISO from the Volume Licensing Service Center (VLSC) – the exe is included inside the installation media.

OSPPREARM.exe stands for Office Software Protection Platform Re-Arm.

It is a legitimate, digitally signed executable developed by Microsoft Corporation. Its sole purpose is to reset the licensing status of Microsoft Office products back to an unactivated state. This allows an administrator or user to enter a new product key or extend the “initial grace period” on certain volume-licensed versions of Office. You can also check the file hash against

Where is it normally found? On a system with Microsoft Office installed, the legitimate path is: C:\Program Files\Microsoft Office\Office16\ (or Office15, Office14 depending on the version)

How is it used? It is typically run from an elevated Command Prompt using the command: ospprearm.exe After running it, a system reboot is required for the changes to take effect.