PC Desktop Repair & Build Experts in London
From hardware faults and component-level motherboard repairs to custom gaming rigs and AI workstations — our PC repair specialists in London service all types of desktop computers. Professional diagnostics, quality parts, and a 6–12 month warranty on every job.
PC Desktop Services & Pricing
Professional PC repair and build services with transparent pricing — from motherboard-level diagnostics to fully custom builds
Motherboard Repair
Component-level repair for motherboard issues — power circuit repair, chip replacement, and BGA rework using professional equipment. We also repair laptop motherboards.
Hardware Upgrades
Boost performance with strategic upgrades: RAM, NVMe SSD, GPU, CPU, and power supply. We advise on the best upgrade path for your budget and use case.
Specialized
Data Recovery
Recover lost files from failed HDDs, SSDs, or RAID arrays using professional recovery equipment and a clean room environment. We also handle full data recovery services.
Performance Optimization
Deep clean, thermal paste replacement, fan and airflow optimization, cable management, software tuning, and driver updates — get your PC running like new again.
Popular
Custom PC Builds
Gaming rigs, AI/LLM workstations, home offices, or professional workstations — we build to spec with full testing, cable management, and warranty. Also see our business solutions.
Software Solutions
OS reinstallation, virus and malware removal, driver updates, BIOS flashing, partition management, and software optimization — stable, secure, and fast.
Our PC Repair Process
A transparent PC repair process — from first contact to final handover
Professional Diagnosis
Full hardware & software check — £39, credited toward repair
Transparent Quote
Itemised parts, labour & time. No obligation to proceed
Expert Repair
Quality parts, skilled hands — updates throughout
Quality Testing
Every PC repair is stress tested before handover
6–12 Month Warranty
Parts & labour covered on every repair and build
Gaming PC Specialists
We’re not just technicians — we’re passionate about building machines that perform. From selecting the right components and balancing airflow to squeezing every last frame out of your hardware, we treat each build as a craft. Whether it’s a new rig from scratch, a targeted PC repair, or breathing new life into your current setup — we get it right.
- Custom builds matched to your budget and performance goals
- Safe, tested overclocking for stable extra performance
- Air and liquid cooling design and installation
- GPU upgrades — RTX, RX, full compatibility testing
We Also Serve
Beyond gaming, we handle every type of desktop PC repair and upgrade
AI & LLM Workstations
High-VRAM and large-RAM builds for running Llama, Mistral, Stable Diffusion locally — GPU and CPU inference setups with full driver configuration.
Home & Office Users
Slow PC, virus removal, Windows reinstall, SSD upgrades, remote working setup — fast fixes explained in plain English.
Businesses
CAD and creative workstations, fleet management, on-site London support, NAS and networking — monthly plans available.
Why Choose Fixfactor
London’s trusted PC repair specialists since 2014 — 220,000+ repairs, 1,000+ reviews, 4.9 rating
Component-Level Repair
We fix faults most shops can’t diagnose — microscopes, multimeters, professional rework stations. Not just part-swapping.
Warranty on Every Job
6 months on parts replacements, up to 12 months on major repairs and full custom builds. Parts and labour covered.
Transparent Pricing
Detailed itemised quote after diagnostics — credited toward the repair if you proceed. No hidden fees, no surprises.
London Since 2014
Over 220,000 repairs from Victoria and Wimbledon. 4.9/5 across 1,000+ reviews on Google and Trustpilot.
Real PC Projects
A selection of recent PC repair and build projects from our London workshops
256TB Chia Farming Desktop
Built a dedicated Chia cryptocurrency farming rig in 2021. Chia uses proof of space — instead of GPU mining, it stores cryptographic plots across hard drives and checks them against network challenges every ~20 seconds. More storage means higher chances of winning block rewards.
We assembled the system around an AMD Ryzen 5950X (16 cores for parallel plot creation), 16×16TB HDDs for plot storage, a robust motherboard with enough SATA connectivity, a high-wattage PSU to handle 16 spinning drives simultaneously, and a basic GPU — Chia farming needs zero graphics processing power. Installed and configured Ubuntu for optimal disk management and plot scheduling.
New Gaming Build Wouldn’t POST
Customer assembled a gaming PC themselves — new motherboard, new CPU, new everything — but the system refused to boot. No display output, no POST beep. After diagnosis, we found the motherboard shipped with an older BIOS that didn’t recognise the newer-generation processor.
We updated the BIOS using the board’s USB flashback feature — no compatible CPU needed for the update. Once the firmware was current, the system immediately recognised the CPU and booted normally. A common issue with newer chips on older-stock boards.
Desktop Won’t Power On — Faulty PSU
Customer brought in a desktop that wouldn’t start. The tricky part — the PSU wasn’t completely dead. It was passing some power through, so initial signs pointed elsewhere. Fans would occasionally twitch, LEDs flickered, but the system refused to POST.
Using a multimeter on the power rails, we found the voltages were well outside spec — the PSU was delivering inconsistent and insufficient power across the 12V and 5V lines. Replaced the power supply with a properly rated unit, and the system came back to life immediately. All original components and data untouched.
GPU Failure — Local AI Model Offline
Customer’s desktop GPU failed, taking their local LLM setup completely offline. They were running large language models locally and relied on the GPU’s VRAM for inference — without it, their workflow stopped.
We diagnosed the GPU fault, carried out a component-level repair, and restored full functionality. No need to source a replacement card — the original GPU was back in action, and the customer resumed running their local AI models the same week.
PC Desktop Repair Specialists in London
Fixfactor has been repairing and building desktop PCs in London since 2014 — pre-built systems, custom gaming rigs, home office machines, and professional workstations. Dell, HP, Lenovo, Asus, Acer, custom builds, and everything in between. If it sits on or under a desk, we service it.
For standard PC repairs — power supply replacements, GPU swaps, RAM upgrades, storage replacements, fan and cooling fixes — we can resolve most issues within 1–2 days. Parts are sourced from trusted suppliers with typical next-day availability, and you always approve the cost before we proceed.
Motherboard Repair — Our Competitive Edge
This is where Fixfactor stands apart. Most repair shops replace the entire motherboard when something goes wrong — expensive, often unnecessary, and it means losing your data if storage is soldered on. We repair at component level. Liquid damage, power surges, VRM failures, dead BIOS chips, corroded traces — we trace faults to the individual component using thermal cameras, multimeters, and microscopes, then fix them. It saves the board, saves your data, and costs a fraction of a full replacement.
Custom Builds — Gaming, AI, and Professional
Whether you need a high-FPS gaming rig, a local AI/LLM workstation for running models like Llama or Stable Diffusion, or a quiet productivity machine for everyday use — we design, build, and test to your exact requirements. Full cable management, stability testing, driver configuration, and a 12-month warranty on every build.
Drop Off or Ship Your PC
Bring your desktop to our Victoria or Wimbledon workshop, or arrange collection. For larger towers, we offer courier pickup within 2 miles of either location. Need a quote first? Contact us — we’ll give you an honest assessment and realistic timeframe.
PC Repair & Build FAQ
Common questions about our PC services — repairs, builds, diagnostics, and more
How long do PC repairs typically take?
PC repair times depend on complexity and parts availability. Simple component replacements and software issues typically take 1–2 days. Motherboard repairs require 1–5 days. Data recovery or complex fault diagnosis generally takes 2–7 days. Custom builds take 2–5 days once parts are confirmed. We offer Priority and Emergency service tiers if you need a faster turnaround.
What’s included in the £39 PC diagnostic?
Our £39 diagnostic covers a full hardware and software assessment using professional equipment — testing CPU, RAM, storage, GPU, power delivery, and thermal performance. We identify all issues and provide a detailed written quote. If you proceed with the repair, the £39 is applied toward the total cost. If you decide not to go ahead, you only pay the diagnostic fee.
Can you build a PC optimised for running local AI models?
Absolutely. Running models like Llama 3, Mistral, or Stable Diffusion locally requires a very different spec than gaming. The key factors are VRAM (for GPU inference), RAM capacity (for CPU/RAM-based inference with llama.cpp), NVMe speed (model loading), and power delivery. We advise on the best configuration for your target models and budget, and handle the full build including driver setup — CUDA, ROCm, or CPU-optimised environments on Linux or Windows.
I built my own PC and something went wrong — can you help?
Yes, we see this regularly. DIY builds that won’t POST, unstable systems, component incompatibilities, or a build that just doesn’t perform as expected — we diagnose the issue and fix it. We won’t judge the build, we’ll just find the problem. Common causes include bent CPU pins, faulty RAM in wrong slots, PSU under-specification, or BIOS settings that need configuration.
What warranty do you provide on repairs and builds?
Every PC repair and build comes with a 6–12 month warranty. Basic repairs and component replacements come with a 6-month warranty. Major repairs such as motherboard-level work and full custom builds typically carry a 12-month warranty. The warranty covers parts and labour for the specific fault repaired. We’ll always make it clear what’s covered before you approve the quote.
How much does a custom gaming PC build cost?
Custom gaming PC costs vary by performance tier. Entry-level builds (1080p gaming) start around £700–900 all-in. Mid-range systems (1440p, high refresh) run £1,200–1,800. High-end builds (4K or competitive esports) from £2,000+. Our assembly service starts at £150, covering full cable management, system configuration, overclocking (if requested), stability testing, and warranty. We’re happy to advise on the best parts combination for your budget.
Do you repair liquid-damaged PCs?
Yes. We handle liquid damage using ultrasonic cleaning, corrosion treatment, and component-level diagnosis. Success depends on the type of liquid, how long it was in contact, and whether power was applied after the incident. For best results, bring the PC immediately without attempting to power it on. Service starts at £99 with a full cost determined after diagnostics.
Do you offer on-site PC repair in London?
Yes, we provide on-site support for business clients across London. Our technicians can visit your office for diagnostics, hardware upgrades, and software tasks. Complex motherboard-level repairs requiring specialist equipment are carried out at our workshop. We offer flexible scheduling to minimise disruption. Monthly support plans are available for businesses that need ongoing IT help.
Request a PC Service Quote
Tell us about your PC — what it is, what’s happening, and how quickly you need it sorted. We respond promptly and handle the full range of PC repair and build challenges.