The HP Utility is usually a really straightforward install (it's the drivers that are a different story...). Yeah you definitely don't want printer managing colour, but let's fix the software issues first...
Is this a new-to-you printer that you're trying to set up for the first time? If so I suggest restart with a clean slate by uninstalling anything related to the printer from Windows.
- In Control Panel > Devices and Printers > find the printer >Delete
- In Settings > Apps > HP Utility > Uninstall
- Ditto > HP Proactive Services (if not already removed)
- Ditto > HP Z3100
- Reboot
- Control Panel > Administrative Tools > Print Management > under your PC > Printers > make sure it's gone, Delete otherwise.
- Ditto > Ports > if you still see a Z3100 port delete it.
- Ditto > Drivers > if you still see a Z3100 driver delete it.
- Reboot again recommended.
Ok now install your Z3100 driver package. If you don't have it, download it from HP here:
https://support.hp.com/sk-en/drivers/hp-designjet-z3100-photo-printer-series/3204970- Select Windows 8 OS (it's not listed under later OS versions like Win 10 but it's the same driver) and choose 32 or 64 bit depending on your Win version.
- Grab the Raster PCL3 driver (there's no use for the Postscript or HP-GL/2 RTL drivers) but make sure you get the right version for your printer, either "Z3100" or "Z3100PS" (mine's a PS). Version is 61.101.366.41 from Oct 2012.
- Grab the HP Utility while there, it's 1.17.0.3 same for everyone, last one they made.
- (Can come back later and grab Paper Presets if you want but they're not super important right now, and I think the driver package has some anyway.)
- Install the raster driver package.
- Install HP Utility.
Should be good to go at that point.
If this was a printer you were using for a long time and HP Utility only recent started acting up, I'd suggest just uninstall HP Utility and try reinstalling it. If that doesn't work, then I'd try the complete remove / reinstall described above.
Edit: PS I think others here have mentioned it still runs ok with Win 11 too.