Boot into safe mode with networking. Download, install, and update malwarebytes. Do a full system scan. www.malwarebytes.org/
Legacy settings are usually for older hardware. But I'm not familiar with that particular one. If malwarebytes picks it up, then you should remove it, if not, you should remove Norman. Either way, malwarebytes is the better scanner.
i'm use Norman Malware Cleaner to scan my computer and i find message "Removed services: nswojot"
and then i'm open my register with REGEDIT command and search it.
what is LEGACY_nswojot on my win xp register ? is that a virus ?
what i must to do ?
Random letters such as those frequently indicate malware so let Norman deal with it. You could remove it manually but you'd need to take Permissions over it in the Registry before you can remove a Legacy entry. Did you hit Function 3 to find other instances of the same name? Do that just in case it belongs to a valid utility.