...windows defender? it showed a program called cnslmain.exe i have heard that this can be a virus sometimes, should i be worried? i run avg free edition should i perform a scan?

google the program, someone should list information about the file. AVG is a horrible virus scanner (because it's mainly free from a shovelware company)

no doubt it's prolly Canon checking stats on its customers, so basicly a trojan.

this may help you

http://www.castlecops.com/s16170-CNSLMAIN_exe.html