all history saved but...

hi there

 

i just went into my norton history files to export and save them just to see for maybe future reference.

 

they look saved but when i click to open, it tells me the file cannot be opened and to either get help from the web or look for a program on my  list to open it.

 

thing is, which program opens it?.

 

 

im using windows 7.

 

thanks so much.