A virus program has to be run before it can infect your computer. Viruses have ways of making sure that this happens. They can attach themselves to other programs or hide in code that is run automatically when you open certain types of files. You might receive an infected file on a disk, in an email attachment, or in a download from the internet. As soon as you launch the file, the virus code runs. Then the virus can copy itself to other files or disks and make changes on your computer.

OHC implement Sophos Anti Virus software solutions. Sophos is one of the world's largest specialist developers of anti-virus and anti-spam software. The company designs solutions specifically to protect businesses and organisations, including large corporations, banks and governments, from viruses and spam. Headquartered in the UK, Sophos sells and supports its products in more than 150 countries through a global network of partners and subsidiaries. The company has offices in the USA, Australia, Canada, France, Germany, Italy, Japan and Singapore.

Over 20 million users from organisations of all sizes already benefit from its software and first-class 24/7 support. Sophos's vision, commitment to research and development, and rigorous attention to quality have taken thecompany from strength to strength. As a result, Sophos continues to grow rapidly at twice the market rate.

Sophos has won many awards, including Company of the Year at the Real Business/CBI Growing Business Awards.