MSN Security Protection Center - a series of free security protection services for MSN.

The MSN Security Protection Center is a range of free security protection services for MSN jointly launched by the Microsoft-owned Windows Live and Kingsoft Antivirus. The "MSN Shield" can help users with routine detection and prevention of popular MSN viruses as well as scan various popular viruses that may be included in the process of sending files to friends. "System Repair and Optimization" can provide services such as malicious software cleaning, system vulnerability repair, and browser repair. To use the MSN Security Protection Center, users need to install the software client.