Stymee 0 Newbie Poster

When using programs on my computer the commit charge raises, then when I close down these programs it returns to same commit charge it starts out with after I start up the computer. 353/3430M When I run Zonealarm Security suite and scan for viruses the commit charge raises to 560/3430M and never returns to 353/3430M, it just stays at 560/3430M. Any suggestions on what to look for or check out would helpful.