i cant run my avg 2013 setup. it's showing an invalid parameter has passed. what i should do? please help me.

I can't find any reference to that particular AVG error code. I suggest you post on the official AVG 2013 help forum here: http://forums.avg.com/ww-en/avg-for...
Agree with #1 but did you have some previous AV on there? Sometimes when uninstalled it leaves remnants that screw up a new AV. Most AV providers have an uninstall file on their websites which clears things up. Always pop back and let us know the outcome - thanks
