Chuck is a retired engineer and his computer won't run any programs he wrote in Basic or Visual Basic. Leo says that the DLLs aren't supported in Windows 7 or Windows 8. An XP machine would run these, but Microsoft won't be supporting it after March 2014. That means it won't continue to be safe to use online, but if it won't be on the internet, he should be fine running it. Leo suggests running Windows XP virtually on a Windows 7 machine, along with Visual Basic. It'll run just fine that way.