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JTG Systems
Onsite Computer Repair Experts
Looking for Onsite Computer Repair?
PC won’t boot? Printer offline? Our technicians resolve it at your home or business.
We are the highest-rated computer company in Niagara.
JTG Systems delivers fast onsite diagnostics, hardware repairs, networking fixes, and user support across the Niagara Region. Schedule a visit that fits your calendar and get transparent pricing with a 90-day workmanship warranty.
Same-Day AvailabilityHome & Business VisitsFree Travel Within Niagara
Walk-ins & onsite bookings. Choose a visit time that works for you or drop equipment off at our Niagara shop—we’ll keep you updated every step of the way.
Niagara's Trusted Onsite Computer Partner
For more than two decades, JTG Systems has provided rapid onsite repair to homes and businesses in Fonthill, Niagara Falls, St. Catharines, Welland, Thorold, Pelham, Port Colborne, and beyond. From mission-critical office workstations to family PCs that won't boot, we bring the tools, parts, and experience directly to you.
We diagnose issues on the spot, clearly outline your options, and complete most fixes in a single visit. When specialized parts are required, we handle the sourcing and return to finish the job quickly—always backed by a 90-day workmanship warranty.
Onsite visit highlights
- Expert PC & Mac technicians dispatched across the Niagara Region
- Upfront estimates before work begins—no travel fees within Niagara
- Support for desktops, laptops, printers, networking, and smart devices
Trusted Across Niagara
20+
Years of Service
Established 2005
1,100+
5-Star Reviews
Trusted across Niagara
Same Day
Service Available
Rapid onsite response
90-Day
Workmanship Warranty
Coverage on parts & labour
Experienced Technicians
We service PCs, Macs, laptops, and printers using best-practice repair methods and genuine, warrantied components.
Fast Response
Choose same-day or scheduled visits to minimize downtime and keep your household or team productive.
Local Coverage
Serving Fonthill, Niagara, Niagara Falls, Niagara on the Lake, Pelham, Port Colborne, St. Catharines, Thorold, Welland with technicians ready to assist residential and commercial clients onsite.
Our Comprehensive Onsite Services
From urgent troubleshooting to proactive maintenance, we handle everything you need without removing devices from your premises:
- Virus removal
- iMac tuning
- Data recovery
- Email troubleshooting
- Printer installation and maintenance
- Magic Jack installation and troubleshooting
- Hardware repair and replacement
- Operating system installation and troubleshooting
- Software installation and configuration
- Network setup and maintenance
- Backup and disaster recovery planning
- Cybersecurity assessment and protection
- Online privacy and security protection
- Web design and development services
- Cloud computing setup and support
- Mobile device support
Detailed Onsite Expertise
Hardware Solutions
- Hardware repair and replacement: Power supplies, motherboards, GPUs, RAM, and peripherals.
- Printer installation & maintenance: Configure network queues, drivers, and shared access.
- All-in-one & iMac tuning: Optimize for creative, educational, and business workloads.
- Mobile integration: Connect smartphones and tablets to secure Wi-Fi, email, and backups.
Software & System Services
- Malware remediation: Clean infections, harden systems, and restore performance.
- OS deployment: Install, migrate, and troubleshoot Windows, macOS, and Linux.
- Software rollout: Configure productivity suites, accounting tools, and line-of-business apps.
- VoIP & conferencing support: Install and troubleshoot Magic Jack, VoIP phones, and video gear.
Data & Network Services
- Data protection: Backup configuration, recovery drills, and failover planning.
- Email troubleshooting: Fix sync problems, credential loops, and hosted mailbox issues.
- Secure networking: Optimize Wi-Fi, deploy mesh systems, and configure VPN remote access.
- Cloud enablement: Set up Microsoft 365, Google Workspace, and hybrid backup workflows.
Security & Business Services
- Business continuity: Build backup strategies, documentation, and training playbooks.
- Cybersecurity assessments: Patch endpoints, harden access, and modernize MFA policies.
- Privacy & compliance: Implement secure browsing, password management, and audit trails.
- Web & cloud liaison: Coordinate with hosting providers, domain registrars, and SaaS vendors.