My Toshiba is I think about 7 years but I would really like to keep using it. I have a new model so at least I have something I can use. What I need to know is can the operating system be upgraded? I think my old Toshiba is a PS-305 I purchased in 2005. I can't even get on the internet now because of the newer versions of explorer. I did a complete software re-install and I can't get to explorer to upgrade.....help.....not sure about the categories below....it Windows Service Pack 2.