The Tell-Tale Signs Your PC or Laptop Needs Help (And What Actually Happens Next)

Computers rarely just die out of nowhere. Almost always, there's a run-up — weeks or months of small warning signs that get explained away as "it's just old" or "it's always been a bit like that." By the time someone actually calls me, the machine's usually been trying to tell them something for quite a while.

This isn't a scare piece designed to get you booking a repair you don't need. It's the opposite — a plain guide to what different symptoms actually mean, so you can tell the difference between "needs a proper look" and "that's completely normal, don't worry about it." And for the jobs that do need sorting, I'll walk through exactly what happens once a machine lands on my bench, so there's no mystery about where your money's going.

Slow and sluggish

This is the one almost everyone mentions eventually — "it used to be fine, now everything just takes forever." A machine that's noticeably slower than it used to be is telling you one of a few things:

• Storage is clogged. Years of temporary files, half-finished updates, and software you installed once and forgot about all sit there quietly eating into performance.
• Too much starts up at once. Every program that's ever asked "would you like me to start automatically?" and got a yes is fighting for attention the second you switch on. That adds up.
• Dust is choking the cooling. When a machine can't cool itself properly, modern processors deliberately slow themselves down to avoid overheating — so a machine that's dusty inside isn't just louder, it's often measurably slower too.
• The drive itself is failing. Older mechanical hard drives in particular get slower as they start to fail, well before they stop working completely.

The good news: the first three are exactly what the Speed Up My PC service sorts — a proper clean, inside and out, junk stripped out, startup tuned, and the case opened up to clear the dust from the fans and cooling. Most machines feel genuinely new again afterwards. The fourth one — a failing drive — needs identifying rather than just cleaning around, which is exactly what a proper diagnostic catches early, before it becomes data loss instead of just annoyance.

Won't start, crashes, or blue screens

This is the more urgent end of things. A machine that won't turn on at all, restarts itself randomly, or throws up the dreaded blue screen is telling you something's gone wrong at a deeper level than just clutter.

Common causes include a failing power supply, a graphics card or memory module starting to give up, corrupted system files after a bad update, or — increasingly common — a hard drive or solid-state drive on its way out. The tricky part is that several completely different faults can produce almost identical symptoms, which is exactly why proper diagnosis matters rather than guesswork.

This is what the standard PC diagnostic & repair service is built around — up to an hour getting to the actual root of it, whether that's at your home or dropped in at the workshop. If a part turns out to be needed — a new drive, a memory module, a power supply — you'll always get the price before anything's fitted, never after.

Strange pop-ups, locked accounts, or anything that smells like a scam

This category deserves its own section because the stakes are different. If you're seeing pop-ups you don't recognise, can't get into an account that used to work fine, or there's any hint that money or passwords might be at risk, the priority isn't speed — it's making sure nothing's actively being taken from you while you decide what to do.

Signs worth taking seriously:

• Pop-ups claiming your computer is infected and demanding you call a number or download something
• Passwords that suddenly stop working across multiple accounts
• Unfamiliar charges on a card linked to something on the machine
• The machine running processes you don't recognise, or behaving oddly when you're not using it
• Friends or contacts receiving messages from your accounts that you didn't send

If any of that rings a bell, don't sit on it. The Been Hacked? service exists for exactly this: your machine is collected, brought to the workshop, and properly stripped down and analysed using the latest AI crawling technology, hunting down every trace of suspicious software rather than just running a quick scan and hoping. Everything's upgraded, fixed or cleaned as needed, your accounts and passwords get locked back up safe, and it's returned to you the same day.

Lost photos, missing documents, or a drive that's making odd noises

A hard drive making a clicking, grinding, or repetitive beeping noise is one of the few genuinely urgent warning signs in this whole list. Mechanical drives fail in stages, and that noise is very often the last stage before they stop responding altogether. If you hear it, the single best thing you can do is stop using the machine and get it looked at — every minute of continued use is a chance to lose more of what's on there.

Even without warning noises, sometimes the damage is already done — a machine that won't start at all, or a drive that's simply stopped being recognised. That's what data recovery is for. Drop the machine or the drive in, and I'll take a genuine, free look at what can actually be saved before anything's agreed or charged. Photos, documents, the lot — recovery is always quoted before any work starts, so you know exactly what you're paying for and what your chances are before committing to anything.

"If a drive is making a noise it's never made before, that's not the time to 'see if it settles down.' That's the time to switch it off and get it looked at."

Overheating, loud fans, or a laptop that's uncomfortably hot

Heat is the enemy of every computer, and a machine that's running hot is quietly shortening its own life every time it happens. The most common cause by far is simply dust — years of it, built up around fans and heatsinks, turning what should be an efficient cooling system into an insulated blanket.

The fix here overlaps with the slow-and-sluggish section above: a proper physical clean, done on the bench rather than balanced on a lap, clears the dust out and lets the machine breathe again. In more stubborn cases, a fan itself may need replacing — again, always quoted and agreed before it's fitted.

Cracked screens, dead batteries, and worn-out keyboards

Not every fault is hidden inside the case. A cracked laptop screen, a battery that used to last all day and now dies by lunchtime, or a keyboard where half the letters have worn smooth or stopped registering — these are some of the most common repairs I do, and they're often more affordable than people expect.

The process is straightforward: the part gets identified, matched precisely to your machine's make and model rather than a generic near-enough substitute, and quoted before anything's ordered or fitted. Screens, batteries & parts fitted runs at the standard workshop rate of £49.99 an hour plus the cost of the part itself — no guesswork, no "while I'm in there" surprises.

A battery that's failing is worth catching early too, for the same reason as everything else on this list — a battery on its way out can eventually swell, which in the worst cases pushes against the trackpad or case. If your laptop's battery life has quietly halved over the last year, that's worth mentioning next time it's in for anything else, even if it's not the main reason you're calling.

How often should a healthy machine actually be checked?

There's no need for a rigid schedule — computers aren't cars, they don't need an MOT every year — but a rough rule of thumb is worth having. If a machine is more than two or three years old and has never had its insides cleaned out, that's usually worth doing regardless of symptoms, simply because dust accumulates whether or not you've noticed it slowing things down yet. Beyond that, the honest answer is: act on the symptoms in this guide as they appear, rather than waiting for a fixed date on a calendar.

What actually happens once your machine comes in

Whatever the symptom, the process behind every repair follows the same honest steps:

1. Tell me what's happening, in your own words. You don't need technical language — "it's dead," "it's making a horrible noise," "it just feels wrong" are all completely fine starting points.
2. Proper diagnosis, not guesswork. Symptoms get narrowed down methodically rather than parts being swapped at random and hoped for.
3. Any part needed gets quoted first. You'll always know the cost before anything's fitted — that's non-negotiable, whatever the job.
4. The actual fix, done properly. Not a patch that lasts a fortnight — a fix that addresses what's actually wrong.
5. Testing before it goes anywhere. Powered on, run for a while, the original fault specifically checked rather than assumed fixed.
6. A plain-English explanation. What was wrong, what was done, and — if it's relevant — what to keep an eye on going forward.

The one thing that prevents most of this: backups

Every single item on this list gets less frightening if there's a proper backup sat safely elsewhere. A drive failure is an inconvenience if your photos are backed up; it's a genuine loss if they're not. A hacked account is a stressful afternoon if you can lock it down and move on; it's far worse if there's no record of what was on the machine to begin with.

The Virus scan + total backup service covers exactly this — a complete clean, then 100% of your system backed up to the cloud on your own account, with automatic timed backups running on whatever schedule suits you. It's the single cheapest insurance policy against everything else on this page.

When it's nothing to worry about

Not everything on this list means trouble. A machine running a little slower after five years of daily use, a fan that spins up occasionally under heavy use, the odd freeze that clears itself with a restart — all of that is broadly normal wear rather than a fault. The difference is usually pattern and severity: occasional and mild is normal life; frequent, worsening, or accompanied by noises and heat is worth a proper look.

If you're genuinely not sure which category you're in, that's exactly what a phone call is for. Describe what's happening and I'll tell you straight whether it's something to book in or something to simply keep an eye on.