Internet Explorer video problems?

Problems with opening files ,internet explorer ,and itunes?

• Problems with opening files ,internet explorer ,and itunes? My computer had all types viruses and securtiy problems etc so i bought and install Norton Antivirus 2010 Now i try to open Internet Ixplorer something pops with list of programs on the top it says Open With It says "Choose the program you want to use to open this file" i click explorer and it says to run or save something I try to open itunes and it says "The file does not have a program associated with it for performoming this action.Create an association in the Set Associations control panel" I try to open internet explorer differently and it says application not found and ti may have been moved, renamed, or removed dont know what to do do i reinstall and how go set associoation or defalut programs and do what WHAT DO I DO AND WHAT IS THE PROBLEM THAT IS CAUSING THIS is the virus or norton security

• Answer:

  1) http://support.microsoft.com/kb/950505 to fix the immediate problem. (The virus caused this.) 2) Download Avast (http://www.avast.com/eng/download-avast-home.html ), install it and run it. 3) Stop Norton Antivirus, remove it and forget it. It's a terrible program that doesn't do much and slows your computer a lot. Avast does a lot more, doesn't slow your computer as much - and is free. Next time, ask first, and you might save some money.