How did you install Zorin. Are you intending to dual-boot with Windows 7?
It may be worth your while reading advice here: Before you install
Also this may help: [SOLVED] Black screen after install
How did you install Zorin. Are you intending to dual-boot with Windows 7?
It may be worth your while reading advice here: Before you install
Also this may help: [SOLVED] Black screen after install