To fix a slow computer, start by restarting it to clear temporary data and free up memory. Then check the Task Manager to see if any apps are using too much CPU, RAM, or disk resources, and close unnecessary ones. Disable startup programs that run automatically to reduce background load. Free up disk space by deleting unnecessary files or uninstalling unused applications. Keep your operating system and drivers updated for performance improvements. Pausing cloud syncing services like OneDrive can also help if running in the background. If the issue persists, consider upgrading hardware components such as RAM or switching to a faster solid-state drive (SSD) for better responsiveness. Running antivirus scans to remove malware and cleaning physical dust from cooling fans to prevent overheating are good preventive steps. If needed, professional maintenance or a system reset may be options to explore.