It’s a helpful tool to figure out what is slowing down your Windows 7 computer and fix it. The Performance troubleshooter in Windows 7 changes settings to help improve overall speed and performance. Method 1: Run the Performance troubleshooter So let’s cut to the chase and go straight to the point. And too many programs and applications running in your computer will lead to the problem as well, since these programs are eating up most of your system resources.īut there are workarounds to improve Windows 7 performance. Generally speaking, the insufficient disk space or system memory will cause your computer slow or lag. Sometimes it’s hard to exactly identify the cause. Sometimes your Windows 7 computer become slower after Windows Update, or you open several programs in your computer will also cause your slow system. Your Windows 7 computer is running slow down to a crawl? Don’t worry.