Canon Plotter Printer Troubleshooting: How We Fixed It

How we solved a complex printer connectivity issue for a Chicago construction business

Kyle C. Rode
October 28, 2025
8 min read

TL;DR

A construction business owner's Canon IPF785 plotter printer stopped working after his son attempted a computer repair. What seemed like a simple printer installation became a three-day troubleshooting marathon involving Windows 11 Group Policy restrictions, registry settings, and ultimately a complete Windows reinstall. We discovered that Windows 11 had disabled manual printer installation options, preventing connection to the network plotter. The solution? A fresh Windows installation followed by proper printer driver installation. This case demonstrates why sometimes starting fresh is the best path forward.

Canon Plotter Printer Connection Problem

Bob and his wife have built a successful professional services business serving the Chicago construction industry for decades. Their operation depends on reliable technology—especially their Canon IPF785 plotter printer in the back room, which prints the blueprints and technical drawings their clients need. When Bob's desktop printer stopped working, his son attempted a quick fix. The repair worked for the local printer, but it broke something critical: the connection to the network plotter printer.

What should have been a straightforward printer reconnection turned into something far more complex. Bob called us in to fix what seemed like a simple problem: reinstall the printer drivers and get back to work. We had no idea we were about to spend three days unraveling one of the most frustrating Windows 11 printer issues we've encountered.

This is the story of that troubleshooting journey—and what we learned about Windows 11 printer restrictions that every IT professional should know.

Canon Plotter Troubleshooting: What We Tried

I arrived at Bob's office ready to tackle what I thought would be a routine printer setup. I followed my standard troubleshooting protocol for printer connectivity issues. First, I removed the non-functioning plotter printer device from Windows 11. Then I fixed the connection to Bob's desktop printer. I applied the latest Windows 11 operating system updates. I tried every method available in Windows Settings to add a printer—and nothing worked.

That's when things got strange. The option to add a local or network printer manually was greyed out. The option to add a printer by IP address was limited to IPP protocol only. When I tried connecting by hostname and printer name, Windows said we didn't have permission to the print queue. The printer installation software kept failing during driver installation.

I wasn't dealing with a simple connectivity issue. I was dealing with Windows 11 security restrictions that were actively preventing printer installation.

Troubleshooting Canon Plotter: Group Policy and Registry

I started adjusting Group Policy Object (GPO) settings that control printer installation permissions. I modified registry settings that should have allowed manual printer installation. After backing up the registry, I made multiple changes to enable printer device installation. Still nothing worked.

I attempted to use a system recovery point to restore the computer to a previous state—only to discover that recovery points had never been configured on this machine. That option was off the table.

At this point, I consulted with AI assistants to help develop solutions. I asked Copilot to create a PowerShell script that would install the five necessary printer drivers. The script looked promising, but when I ran it on Bob's computer, it failed. I then asked Grok to improve the script, and we tried again. Same result—failure.

We were three days into this job, and every troubleshooting step was hitting dead ends. The computer was misbehaving at every turn. What should have been a one-hour printer installation had become a nightmare of compatibility issues and Windows restrictions.

Canon Plotter Printer Backup Strategy

At this point, we made the decision to back up all of Bob's user data to an external hard drive. This process took much longer than expected—the computer's performance issues made even basic file operations slow and unreliable. We were looking at a complete Windows 11 reinstallation as our best path forward.

Sometimes, you have to start over from scratch to get the results you want. However, it's good to exhaust all options before a hard reset. We had definitely exhausted our options.

How We Fixed the Canon Plotter Printer

We performed a complete Windows 11 reinstallation on Bob's computer. After the fresh install, we reinstalled all his applications. Then we tried the printer installation software again—and this time, it worked perfectly. The Canon plotter printer connected without any issues.

After confirming the printer was working, I ran additional PowerShell scripts I'd developed to ensure all necessary programs were installed, including Chrome and Brave browsers. I also configured the Restore Point technology and enabled it for future use. This would prevent similar situations from happening again.

Bob was back in business, printing blueprints and serving his construction clients without interruption.

Canon Plotter Printer Troubleshooting Lessons Learned

This case taught us valuable lessons about Windows 11's security model. Microsoft has implemented multiple layers of restrictions around printer installation to prevent unauthorized driver installation and potential security vulnerabilities. These restrictions include Group Policy settings, registry configurations, and device installation restrictions.

The specific settings that were blocking printer installation included:

Point and Print Restrictions: Preventing non-admin driver installation
Device Installation Restrictions: Blocking manual device setup
Registry Settings: DisableAddPrinter and NoAddPrinter values preventing UI access
AllowUserDeviceInstall: Not enabled for manual device installation

While these security measures are important, they can create situations where legitimate printer installation becomes impossible without administrative intervention or system-level changes.

Prevent Canon Plotter Printer Issues

If you're managing Windows 11 computers in your organization, here's what we recommend:

Enable System Restore: Configure restore points regularly so you have recovery options
Document Printer Configurations: Keep records of working printer setups for quick reference
Test After Major Changes: Verify printer connectivity after any system updates or repairs
Use Professional Installation Software: Always use manufacturer-provided printer drivers rather than generic Windows drivers
Maintain Backups: Regular backups make system recovery much faster and safer
Consider Professional IT Support: Complex printer issues often require professional troubleshooting expertise

Canon Plotter Printer Problems? We Can Help

Whether you're dealing with a Canon plotter that won't connect, Windows 11 printer restrictions, or any other IT infrastructure challenge, myTech.Today has the expertise to solve it. We've spent over 20 years troubleshooting complex technology issues for businesses throughout the Chicago area.

Don't let printer problems disrupt your business operations. Contact us for a free consultation on your printer setup, network configuration, or any other IT challenges.

Call us at (847) 767-4914 or visit mytech.today/contact for a free estimate.