You can clean up your PC for free by performing a series of maintenance functions using tools and utilities provided by your operating system. A slow-performing PC takes long to boot and load applications or hangs or freezes frequently, says CNET.
Optimize your system for better performance. Begin by deleting cookies, the cache and your browser history from your browser. Explore your hard drive using the Disc Cleanup utility to sort out your important files, and free up some space by deleting any unwanted files. Evaluate all the programs that run on your PC, and uninstall the unnecessary ones. Run a full scan using antivirus software to protect your PC from viruses and other suspect files.
Enable defragging of your hard drive to save up on running data. Follow up by backing up all your data on the drive to secure your files. Dust the hardware as well particularly around the air intakes. Dust and hair follicles clog the fan and make it spin slower. Take your time and come up with a strong boot password as this goes a long way to ensure security for your files and your PC, advices DailyTech. Check to see whether your PC's performance has improved.