Hello, I am Christina Pine. I am a printer’s offline executive and freelancer. If you are experiencing the frustrating issue of your HP printer being offline on Windows 8, there are several possible reasons for this problem. Firstly, it is important to check your printer's connectivity to your Windows 8 computer. If your printer's connectivity is not the issue, then you may need to update or reinstall your printer drivers. If updating or reinstalling your printer drivers doesn't solve the problem, then there may be a hardware malfunction with your printer.