AVG "not running"

Hello I am trying to use my computer on my colleges wifi but I am never able to because it says that avg is installed but not "running" which is not the case because it has worked before. Does anyone know what I can do?
thank you

Hello Jessica,

I understand the inconvenience. Please repair AVG Internet security/ AVG Antivirus free http://support.avg.com/SupportArticleView?urlname=How-to-repair-AVG from the control panel and then check the status.