New Member with a Facebook question

HI,
 
I am a new member and just put SecureAnywhere on my PC.  It is a Dell computer with Windows XP Home Edition.  I am using Firefox as my search engine.
 
Right after I installed the program on my computer I noticed that many times (but not all times) my keyboard would not function properly when chatting on Facebook.  I have also noticed the same problem when trying to send email messages.  The letters start to become capital letters and the puncutation keys don't work properly either.  Any ideas?
 
Thank you.  I look forward to your replies.
 

BTW I am not very computer literate so you will need to be very basic in your explanations.  SMILe