HPZ12 is actually a reference to HP's Print Management Language...
You may need to reinstall your printer software or find compatible drivers for Vista.
One should remember this when upgrading, installing, or reinstalling an operating system:
Only have the necessary peripherals plugged in when performing the above:
1) Monitor
2) Keyboard
3) Mouse
If you have anything else installed when performing an upgrade, install, or reinstall...you're bound to have issues afterwards.
Good luck and let us know how it goes after you reinstall your printer software.