+1 (773) 987-6677
Welcome to Computer Service DK LLC

The smart way to fix computers

Your Trusted Technology Partner Around the World

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Hardware

Repair, upgrade, and maintenance for desktops, laptops, and all computer components.

Software

Installation, configuration, troubleshooting, and upgrades for operating systems and applications.

Networking & Security

Installation, configuration, troubleshooting, and upgrades for operating systems and applications.

What we offer

We fix computers & business servers

Computer Repair Service

  • Desktop computer repair
  • Laptop repair
  • Hardware diagnostics & replacement
  • Operating system repair
  • Computer performance optimization
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Computer Support and Services

  • Operating system installation & configuration
  • Software installation & troubleshooting
  • System cleanup & optimization
  • Remote computer support
  • On-site computer support
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Computer Service

  • Computer system analysis
  • Hardware & software upgrades
  • New computer setup & configuration
  • Data backup solutions
  • Computer maintenance services
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Computer Networking Service

  • Network design & setup
  • Network troubleshooting & administration
  • Internet installation & configuration
  • Wired & wireless network installation
  • Business & home network solutions
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Data Recovery Service

  • Hard drive data recovery
  • SSD data recovery
  • Laptop & desktop data recovery
  • Recovery of accidentally deleted files
  • Data backup & recovery solutions
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Security System Installation Service

  • Security camera installation
  • CCTV system installation
  • Camera system configuration
  • Residential security system installation
  • Commercial security system installation
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Internet Marketing Service

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Why Choose Computer Service DK LLC?

At Computer Service DK LLC, we provide professional, reliable, and personalized computer and IT solutions for both homes and businesses. Led by Dariusz Kasprzycki, our mission is to keep your technology running smoothly, efficiently, and securely. From computer repairs to network solutions and security systems, we handle it all so you can focus on what matters most.

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Local Expertise

Fast, reliable service in Chicago, IL

Customer Support

From PCs to networks to security systems, we handle it all

Customized Solutions

Tailored to your home or business needs

Trusted & Secure

Keep your systems safe and running efficiently

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How We Work

We can solve any computer-related problem

1. Free Initial Consultation

We start by understanding your issue and goals, whether it’s a single computer or a full business system.

2. Clear Diagnosis & Plan

You receive a straightforward explanation of the problem and the best solution—no unnecessary upsells.

3. Professional Execution

Repairs, installations, or configurations are completed efficiently and correctly the first time.

4. Ongoing Support

We’re available for future maintenance, upgrades, and technical support.

Who We Serve

Residential or commercial - your technology is in expert hands

We proudly support home users and families, small and medium-sized businesses, offices, retail locations, property managers, and commercial buildings. Whether residential or commercial, your technology is always in expert hands. Our experience spans a wide range of industries, including professional offices, retail and service businesses, medical and dental practices, warehouses, light industrial spaces, and residential homes and apartments, allowing us to deliver reliable, tailored technology solutions for every environment.

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"I had a laptop that wouldn’t start, and Dariusz and his team fixed it in no time. Fast, professional, and friendly service—I couldn’t be happier!"
Sarah M.Chicago, IL
"We hired Computer Service DK for our office network setup. Everything was installed perfectly, and they explained everything in plain language. Highly recommend!"
James T.Chicago, IL
"I needed a complete CCTV and security camera installation for my business. Dariusz made it seamless and reliable. The cameras work flawlessly."
Kevin R.Norridge, IL
"I needed a complete CCTV and security camera installation for my business. Dariusz made it seamless and reliable. The cameras work flawlessly."
Maria L.Schaumburg, IL
"From network setup to computer repairs, these guys handle it all. Friendly, trustworthy, and always on time. I wouldn’t call anyone else in Chicago."
Emily S.Naperville, IL
FAQ

What can we help you with today?

A: We repair both desktop and laptop computers from all major brands. Our services include hardware repairs, software troubleshooting, operating system installation, and performance upgrades.

A: Yes! We offer on-site IT support and network solutions for small and medium-sized businesses, offices, retail locations, and commercial buildings throughout Chicago, IL.

Absolutely. We design, install, and maintain wired and wireless networks, configure internet connections, and provide network administration and troubleshooting for both homes and businesses.

Yes, we provide professional security camera and CCTV system installation and configuration for residential and commercial properties, ensuring reliable monitoring and peace of mind.

We do. Our team provides IT consulting, business system analysis, and technology planning, helping businesses optimize performance, improve security, and plan for future upgrades.

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Contact us today

Get in touch today to schedule a consultation, request a quote, or get urgent support.

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