How to increase system performance

Many factor included in system performance .
virus have some exe file which automatically run
and decerese your system performance .make sureyou have install antivirus ., before scan update your antivirus
install window updates for new features in window

 some time when we uninstall any program or software
it left behind some file in your pc., and some of registry file
do not deleted automatically.. you have to install
pc clean software ., like c cleaner. you can download
trail version from link below