Scan your system for missing patches

Use tools like Secunia PSI from Secunia to scan for missing updates and applications that vulnerable and download the appropriate application or patch and apply it so that your system remains hard on any kind of attack or expliotation. Also remove the outdated applications for which the support ended so that your system remains less vulnerable or prone to attacks. For more visit www.secunia.com

Get Secunia PSI from here

Also see Simplite messenger encryption