I have Nod32 on several of my home computers. On one computer, the version is listed as 18.104.22.168. On another, it is listed as 22.214.171.124. When available version is checked on both of these computers, the different versions are verified as most recently available. Can this be correct? The computer checked with 126.96.36.199 is using Vista operating system. The 188.8.131.52 is using Windows 7. Thanks.