Ubantu Linux
 

I want to get it but can it use Windows programs? Like my wireless router that gives me internet.

Yes, Linux can run certain Windows applications with an emulator.

Your router is a Windows application? If you want to or even have to keep using Windows applications, don't even think about Linux. There's a simple rule, either you absolutely need some Windows applications, then you use Windows or you don't, then you can use anything else. If you're not even willing to get used to different application, Linux or any other operating system will have zero advantages for you and just be a hassle.