Introduction

O&O SpeedCheck checks the settings and measurements of a Windows PC that affect its responsiveness, summarizes them in a performance index and recommends changes. It is intended for anyone who wants to find out why a Windows 10 or Windows 11 computer feels slow and which changes are worth making.

This manual explains how to get started, how to read the results and which actions the application offers. Choose a chapter from the sidebar, or follow one of the links below.

• First steps: complete a first session.
• Feature overview: find the right chapter.
• System requirements: check access and prerequisites.
• Troubleshooting: solve problems with update queries, exports and the application.
• Frequently asked questions: short answers to common questions.
• Support and more from O&O: prepare a support request.

Menu names and buttons in this manual use their English labels. If the application runs in another language, the controls are in the same places.

O&O SpeedCheck is freeware and free of charge to use. It is also supplied as part of O&O Defrag 32.