What do you see most people using at home? Windows. What do you see people using at your Bank, office, etc? Windows, mostly. Most people know the Windows GUI and are used to it - it isn't crappy, it may not be as stable as OSX or Linux, but people like it, that's why they use it. Live with it.
Anyway, PowerArchiver is an awesome program you could use for Windows. For Linux, you can use the tar command.