To ensure that your PC works fine and is secured, you need to follow the following steps:
1) Using Anti-Virus Software: Install an anti virus software on your computer and check that the program is running smoothly. Ensure that you have the latest anti virus and scan your computer at least once in a week. Some of the free anti virus programs are Avast, Avira, Microsoft Security Beta and AVG.
2) Free Downloads: Your computer can catch a virus from free download sites. If you want to download something from the Internet, it is a better idea to pay for the download, as free download sites may contain virus that would harm your PC. Some of the free reputed download sites are PCWorld.com Downloads, Download.com and Sourceforge.net
