Ensure that your system is 'clean'before installing
DefenseWall.
Any pre-existing malware or infected files on your system prior to installing any
security software can still actively cause data loss and damage.
Do a full system scan with a good 1) anti-virus and 2) anti-malware or anti-trojan
application. It is also beneficial to do an online scan with one of the anti-virus
providers as a secondary safety measure.