When to Repair a Computer and When to Replace It

Start With the Numbers, Not the Frustration

A computer that is slow, noisy or refusing to charge is annoying, but the decision to repair or replace should be a financial one first. The simplest rule that works in most UK homes and small offices is the half-price test: if the repair quote is more than half the cost of a comparable replacement, replacement usually wins. If it is well under half, repair almost always makes sense.

To apply that, you need two figures. First, the quote — and ask for it in writing, including parts, labour and VAT. Second, the realistic replacement cost. A dependable everyday laptop for browsing, email, spreadsheets and video calls currently sits somewhere between £450 and £700. A desktop tower for office work lands in a similar range, though a monitor and peripherals may push it higher. Once you have both numbers side by side, the argument usually settles itself.

Typical repair costs give you a rough benchmark. A laptop screen replacement runs £80 to £150 depending on the panel. A battery is £40 to £90 fitted. A keyboard can be £30 to £80, though on some slim models it means the whole top case and the price triples. Replacing a failing hard drive with a solid-state drive is often £60 to £120 in parts plus an hour of labour. Independent repair shops in the UK commonly charge £40 to £70 an hour, so any job quoted past three hours deserves a hard look.

Age Is a Guide, Not a Verdict

Plenty of five-year-old machines are perfectly serviceable, and plenty of three-year-old ones are not worth saving. What matters more than the date on the sticker is the specification and the physical condition.

As a rough guide, a machine is usually worth repairing if it has:

• A processor from the last six or seven years. Anything from around 2018 onwards will handle everyday tasks comfortably once it has enough memory and a solid-state drive.
• At least 8GB of RAM, or a slot to add more cheaply. Memory upgrades are among the best value repairs going.
• A solid-state drive, or the ability to fit one. Swapping a mechanical drive for an SSD transforms an older machine more than almost any other single change.
• A sound chassis, screen and keyboard. Cosmetic scuffs are irrelevant; cracked hinges and failing screens are the expensive kind of damage.

If two or three of those are missing, you are likely throwing money at a machine that will disappoint you again within a year.

When Repair Is the Sensible Choice

Repairs are usually the right call in a few clear situations. A failed power supply, a worn battery, a broken charging port or a single dead memory stick are all cheap, well-understood fixes that restore full function. So is a software problem: a machine crippled by a failing drive, a corrupted Windows installation or years of accumulated clutter often needs an hour of a technician's time and nothing more.

Repair also wins when the machine is a known quantity. If you know its quirks, its files are already backed up from it and its software is licensed and configured, replacing it means an evening of setup and a fresh round of licence purchases. That hidden cost is real, even though it never appears on a quote.

For small businesses, there is a further argument. A repair keeps a working machine in service for another two or three years, spreading the capital cost and keeping the accounts simple. If the device is under a business warranty or a managed support contract, check the terms before you authorise anything — you may already be covered.

When Replacement Is the Wiser Move

Replacement becomes the sensible answer when the repair is only the first of several. A laptop with a failing screen, a swollen battery and a temperamental keyboard is not one repair; it is three, arriving in sequence over the next eighteen months. Add those quotes together and you are paying new-machine money for old-machine reliability.

Other signals pointing the same way:

• Repeated failures in the same area. Two motherboard-level faults within a year is a pattern, not bad luck.
• Parts that are no longer available. If a replacement screen or battery has to be sourced second-hand, the machine is at the end of its supported life.
• A processor that genuinely cannot keep up. If it struggles with the work you actually do, no upgrade will fix it.
• Damage that affects the structure. Cracked hinges, a bent chassis or liquid damage that has reached the board rarely end well.

Do Not Overlook Security

This is the factor most people forget, and it is often the deciding one. A machine that no longer receives operating system updates is a liability, not an asset. Once security patches stop, every unpatched flaw becomes an open door, and no amount of antivirus software compensates.

If your computer cannot run a currently supported version of Windows or macOS, replacement is not really optional — it is a security decision. The same applies to small businesses handling customer data, where an unsupported machine can create real obligations under data protection rules. An older machine that can run a supported system is a different story, and a clean installation plus an SSD can give it years more useful life.

A Practical Way to Decide

Work through it in order. Back up your data first, always, before anyone opens the case. Get a written quote. Compare it with the half-price test. Check whether the machine can still run a supported operating system. Then weigh the setup time and licence costs of a new machine against the certainty of a familiar one.

If the repair is cheap, the specification is adequate and the software is still supported, repair it and enjoy another few years. If the quote is steep, the faults are multiplying or the security updates have stopped, put the money towards a replacement — and this time, budget for a solid-state drive and 8GB of memory as a minimum. That single choice does more for long-term value than any badge on the lid.