[header] How to maintain the performance of a pc [title] Install an anti-virus security software and set up an automated maintenance schedule. [step] Computers with windows operating system often comes with pre-installed anti-virus software trial at the time of purchase. In situation where anti-virus has not been included, you may obtain antivirus software on the internet at little or no cost to the consumer. 
[substeps] Perform an internet search for " anti-virus protection " to retrieve a list of anti-virus programs. Navigate to the preferred manufacturer's website, and follow the instructions for download and installation provided by the developer.