How do i start my Quicken account all over? Delete all info and start agian?

My account is not reconciling with my bank. Certain stuff is not transferring and when I manually put it in its not there when I log back in and my info has been changed. I had a virus or something the tech helped me clean off but it left issues with some of my programs. so now I figured if I uninstall and reinstall that would fix it but it hasn't. so I thought if I delete the whole thing, all info, and then re-enter all my bank, payees, bills etc.. maybe that will help?