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🔧 Free Diagnostic Tool
Slow Computer Diagnosis — Find Out Why Your Computer Is Running Slow
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🔍 Interactive Tool
What's Making Your Computer Slow?
Answer 5 quick questions to identify the most likely cause. No login required.
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Next steps
What Your Result Means
✅ Startup / Software issue
⚠️ Hardware bottleneckCheck SSD upgrade benefit →
🔴 Drive failure / Malware📞 Call Now
What To Do Next
What Your Result Means — Next Steps
Your result points to either a manageable issue you can address yourself, or a fault that needs professional attention before it gets worse.
Key Questions
Hardware or Software? Worth Fixing? Can It Get Worse?
Hardware or software? If the computer is slow even after a complete Windows reinstall, the fault is hardware — failing drive, insufficient RAM, or CPU throttling from heat. Software causes respond to clean installs. Hardware causes don't.
Can it get worse? Yes — a failing hard drive will eventually fail completely, taking your data with it. Overheating left unaddressed causes permanent CPU and GPU damage. Address this soon.
Is it worth repairing? For machines under 7 years old, an SSD upgrade typically costs $120–$220 and transforms performance. For machines 8+ years old, use our Repair or Replace Calculator for a personalised answer.
🚨 Urgency note: Every week a failing drive goes unaddressed is a week closer to total data loss. If your drive is making noise or throwing errors — act today.
Related Tools
Other Useful Diagnostic Tools
Root Causes
What's Actually Causing This?
Understanding why a problem happens helps you make better decisions — and helps us fix it faster.
Too Many Startup Programs
Software loading at startup consumes RAM and CPU before you've done anything. The most common fixable cause.
Failing or Ageing Hard Drive
Traditional HDDs slow dramatically as they age or fill up. An SSD upgrade is the single biggest performance improvement available.
Insufficient RAM
Running out of RAM forces Windows to use your slower hard drive as temporary memory — causing severe slowdowns.
Malware or Background Processes
Viruses, cryptominers, and adware consume resources silently. Unexplained CPU spikes are a key indicator.
Overheating / Thermal Throttling
When a CPU runs too hot, it deliberately slows itself to prevent damage. Clean vents and fresh thermal paste usually fix this.
Ageing or Failing Hardware
RAM beginning to fail, a degrading CPU, or a failing motherboard can all cause unpredictable slowdowns that software fixes won't resolve.
Professional Help
Do You Need a Professional Repair?
✅ You can DIY if:
You can handle it yourself if: startup programs are the issue (Task Manager fix), storage is full (delete files), or malware is light (Malwarebytes free scan). These are genuine DIY fixes that take 30–60 minutes.
🔧 You need professional repair if:
You need professional repair if: the computer is slow after a clean reinstall, the drive is making noise or throwing errors, temperatures are above 85°C under normal use, or performance has declined progressively over weeks despite software fixes.
⚠️ What happens if you ignore this: A failing drive left unattended will eventually fail completely — often without further warning. At that point, data recovery costs $99–$499 and success is not guaranteed. Overheating left unaddressed causes permanent CPU and GPU damage that costs far more to fix than prevention.
Common questions
Slow Computer Diagnosis — FAQs
Too many startup programs, a failing hard drive, insufficient RAM (under 8GB), or malware. An SSD upgrade resolves the majority of slowness complaints.
A factory reset can significantly speed up a computer but won't fix hardware faults like a failing drive. Back up your data first.
8GB is the minimum for 2025 use; 16GB provides comfortable multitasking. Under 4GB, a RAM upgrade will be noticeable.
Computers under 7 years old are generally worth upgrading if the fault is isolated. Use our repair or replace calculator for a personalised view.
Yes — many malware types use CPU and RAM in the background, causing slowness and unexpected shutdowns. Run antivirus as a first step.
Local proof
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