Linux is a decent, stable OS since it depends on Unix (which was utilized to make the Mac OS) and it's not exceptionally vulnerable to infections but rather it's not bolstered by different applications/amusements.
Windows is OK but since it's so prominent it's extremely defenseless to a wide range of malware, however, it is exceptionally all around bolstered by different applications/programming.
I'd suggest you utilize Windows for your fundamental OS and utilize a Linux OS for playing on/surfing (I utilize Ubuntu and XP and Vista).