Desktop PC Repair in London

Complete desktop computer solutions

Based in Walthamstow E17, London, we handle all desktop PC issues from simple upgrades to complex repairs. We also build custom PCs tailored to your specific needs.

Boost your PC: For older or slow desktop PCs, we also offer hardware upgrades including SSDs, RAM expansion, and graphics card upgrades to breathe new life into your system.

From £79+ Free Diagnostic

What's Included

  • Hardware diagnostics and repairs
  • Component upgrades (GPU, RAM, CPU)
  • Power supply replacement
  • Cooling system upgrades
  • Custom PC builds
  • Performance optimization
  • BIOS/UEFI configuration
  • Cable management and cleanup

Common Problems We Fix

"My PC won't boot past the BIOS screen"

Whether it's a corrupted BIOS, a failed storage drive, or a loose connection, we diagnose boot failures at hardware level and get your system running again. We also recover data from drives that Windows can no longer read.

"It keeps freezing or blue-screening"

Blue Screen of Death (BSOD) errors are usually caused by failing RAM, overheating CPUs, driver conflicts, or a dying power supply. We run memory tests, temperature logs, and driver analysis to find the root cause — not just mask the symptoms.

"My gaming PC overheats and drops frames"

Thermal throttling kills gaming performance. We repaste the CPU and GPU, clean heatsinks, replace dried-out thermal pads, and improve case airflow. For high-end rigs, we install custom cooling solutions.

"Windows is stuck in a repair loop or won't update"

Windows Update failures, boot loop errors, and corrupted system files are common. We perform clean Windows reinstalls, preserve your data where possible, and configure updates so they don't break again.

"My PC makes a grinding or clicking noise"

Grinding usually means a failing fan or hard drive. Clicking from a hard drive is a data-loss warning — we replace failing drives, clone data to a new SSD, and test the old drive before disposal.

"I want to upgrade my PC for better performance"

We advise on the best upgrades for your budget: SSD for boot speed, RAM for multitasking, GPU for gaming, or a full custom build made to order. We install, test, and benchmark every upgrade.

Our Repair Process

Step 1

Free Diagnostic

Bring your desktop PC to our Walthamstow shop or arrange a collection across London. We run hardware diagnostics, temperature checks, and stress tests to identify the problem — all at no cost.

Step 2

Repair

From replacing a failed power supply to rebuilding a custom loop, we handle it. Most PC repairs are completed within 24–48 hours. For custom builds, we'll give you a build timeline and parts list.

Step 3

Testing

Every PC is stress-tested, benchmarked, and temperature-checked before return. We verify all ports, drives, and peripherals are working correctly.

Step 4

90-Day Warranty

All repairs and upgrades are backed by our 90-day warranty covering parts and labour.

Pricing Guide

DiagnosticFree
Windows reinstall / software fix£59 – £99
RAM upgrade (including installation)£49 – £129
SSD upgrade (including data migration)£79 – £169
Power supply replacement£59 – £129
GPU replacement / upgrade£79 – £199 (plus GPU cost)
CPU repaste / thermal service£39 – £79
Custom PC build (assembly)£99 – £199 (plus parts)
Cooling system upgrade£49 – £149
Full system clean & optimise£49 – £79

Final pricing depends on the exact parts required. We always confirm the full cost before starting any work.

What affects price and turnaround

Final pricing depends on the exact parts required. We always confirm the full cost before starting any work.

Before you bring your device in

Bring the device and any relevant accessories. We will explain the next steps before work begins.

Frequently Asked Questions

Yes. We build custom PCs for gaming, content creation, and office use, available on request. You tell us your budget and requirements, we source the parts, assemble, cable-manage, and benchmark the system. Build labour is typically £99–£149 on top of parts.

In most cases, yes. We always attempt data preservation first. For Windows reinstalls, we back up your user data and restore it after. If your hard drive has failed, we offer professional data recovery as a separate service.

Not necessarily. BSODs are often caused by a single failing component — a £49 RAM replacement or a £59 power supply swap can fix it. We always diagnose before recommending replacement, and we'll tell you honestly if a new PC is the better investment.

Yes, we offer on-site support for businesses across London. For home users, we recommend bringing the PC to our Walthamstow workshop where we have the tools and parts to do the job properly. Call us to discuss your needs.

Book your free PC diagnostic today

From blue-screen errors to custom builds, our Walthamstow E17 workshop handles all desktop PC repairs. Free assessment, honest advice, and a 90-day warranty on every repair.

Book Your Free PC Diagnostic

Prefer to talk? Call us on 020 8509 0038

Why Choose CompuCare?

Free
Diagnostics

Get a free assessment before any work begins

90 Day
Warranty

All repairs backed by comprehensive warranty

24-48h
Turnaround

Fast service to get you back online quickly

Ready to get started?

Book your repair today at our Walthamstow E17 shop. 300+ five-star reviews and 23 years of expertise since 2002.

Visit us at: 16 St James Street, London E17 7PF | Mon-Sat: 10am - 7pm