How to Speed Up a Slow Windows PC: A Safe Step-by-Step Guide
A slow PC does not always need replacing. The cause might be one demanding application, low storage, pending updates, malware, overheating or hardware that no longer meets your needs. Work through this guide in order and test the computer after each step. Avoid downloading “PC cleaner,” registry-cleaner or driver-updater programs from advertisements; they can create new problems and are rarely necessary. IMPORTANT WINDOWS 10 NOTE Microsoft ended free security support for Windows 10 on 14 October 2025. If your computer still uses Windows 10, check Microsoft's current support and upgrade options. A fast computer that no longer receives security updates is still a risk. BEFORE YOU START Save important files to a trusted backup location. If the computer belongs to an employer or school, contact its IT team before changing settings, uninstalling software or replacing hardware. Write down when the slowdown happens: • Is startup slow? • Is only one application slow? • Does the problem beg...