Why Is My PC Running Slow? Common Causes & How to Fix It

A slow PC or laptop is one of the most common computer problems people search for, and it’s also one of the most frustrating. If your computer takes ages to start, programs freeze, or simple tasks feel painfully slow, you’re not alone.

At Good As New PC Repairs, this is one of the top reasons customers contact us – and in most cases, it’s completely fixable.

Common Reasons Your PC Is Running Slow

1. Too Many Programs Starting Up

Over time, software installs itself to run automatically when your PC starts. This can dramatically slow boot times and overall performance.

Symptoms:

  • Slow startup
  • System lag after switching on
  • Fan running constantly

2. Old or Failing Hard Drive

Traditional hard drives slow down as they age. This is one of the biggest performance killers we see.

Symptoms:

  • Long loading times
  • Freezing or crashing
  • Clicking or grinding noises

3. Not Enough Memory (RAM)

If your PC doesn’t have enough RAM, even basic tasks like web browsing can slow everything down.

Symptoms:

  • Freezing when opening multiple tabs
  • Slow program switching
  • Applications not responding

4. Malware or Unwanted Software

Viruses, spyware, and hidden background programs can seriously impact speed and security.

Symptoms:

  • Sudden slowdowns
  • Pop-ups or strange behaviour
  • Browser redirects

5. Overheating & Dust Build-Up

Dust inside laptops and PCs restricts airflow, causing overheating and automatic performance throttling.

Symptoms:

  • Loud fans
  • PC shutting down unexpectedly
  • Very hot keyboard or case

How Good As New PC Repairs Can Help 💻

At Good As New PC Repairs, we don’t just mask the problem — we fix the cause.

✅ Full System Health Check

We diagnose exactly what’s slowing your PC down.

✅ Speed Optimisation

  • Startup clean-up
  • Software optimisation
  • Performance tuning

✅ SSD Upgrades

One of the biggest upgrades you can make — often making a PC feel brand new.

✅ Virus & Malware Removal

Complete system clean with protection advice to prevent future issues.

✅ Laptop & PC Internal Cleaning

Removing dust and improving cooling for better speed and reliability.

✅ Honest Advice

If a repair isn’t cost-effective, we’ll tell you — no upselling.

Don’t Replace It – Repair It

Many slow computers don’t need replacing. With the right upgrades and servicing, your PC can run faster, cooler, and more reliably for years to come.

📍 Local, trusted, and affordable PC repair
⭐ Highly rated by our customers
🔧 Fast turnaround times

👉 Contact Good As New Computer Repair Specialists today and get your PC running like new again.

Ways to contact us

Get Your Device Back in Action!

Have a question or need a repair? Fill out the form below, and our expert team will get back to you swiftly. Let’s get your device running like new again!