01 Quick Wins — Do These First
These three actions take under 10 minutes total and resolve the majority of slowdowns. Always start here before diving into the deeper steps.
Clears temporary files, flushes RAM, and resets background processes that accumulate over time. If your PC hasn't been restarted in days, this alone often makes a noticeable difference.
Install everything, including optional driver updates. Outdated Windows builds can have unpatched bugs that cause slowdowns and high CPU usage.
Malware is a common but overlooked cause of slowness. Runs a full scan if the quick scan finds anything.
Time your PC before and after
Note your current boot time and how long a common app (like Chrome) takes to open. After working through this guide, re-test. Most users see boot times halve and app launch speeds improve noticeably.
02 Step-by-Step Optimisation Guide
Work through these in order. Each step builds on the last and takes only a few minutes.
Low storage on your C: drive — especially below 10–15% free — causes major slowdowns. Windows needs breathing room for temp files, virtual memory (page file), and updates.
Enable Storage Sense — automatically removes temporary files and empties the Recycle Bin on a schedule:
Run Disk Cleanup for a one-time deep clean including system files:
Uninstall bloatware — sort by size to quickly spot the biggest space-wasters:
Every program that launches at boot takes CPU time and RAM before you've even started working. Reducing startup programs is consistently the single most impactful software change you can make.
- Disable everything non-essential — Spotify, Skype, printer software, OneDrive (if not immediately needed), Discord, Teams.
- Keep: antivirus, audio/GPU drivers, and anything you genuinely use every time you start the PC.
- Aim for under 5–7 startup items. The Task Manager column shows the startup impact — disable "High" impact items first.
- Disabling startup apps doesn't uninstall them — they still run when you open them manually.
Windows may be running your hardware at reduced performance to save battery. Switching to a performance power plan unlocks your CPU's full speed.
For laptops and Windows 11:
For desktops (unlocks Ultimate Performance):
On desktops, you can also unlock the hidden Ultimate Performance plan by running this in PowerShell as administrator: powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61
Windows animations, shadows, and transparency effects look nice but consume GPU and CPU resources — especially noticeable on older or lower-spec machines.
- Select Adjust for best performance to disable everything at once.
- Or keep "Smooth edges of screen fonts" and "Show thumbnails instead of icons" checked if you want a partial compromise between looks and speed.
- Separately: Settings → Personalisation → Colours → turn off Transparency effects.
Outdated drivers — especially for your graphics card and chipset — cause stuttering, crashes, and general poor performance. This is especially important after a major Windows update.
- Graphics drivers (most important): visit NVIDIA, AMD, or Intel's websites directly and download the latest driver for your GPU model.
- Device Manager: Search "Device Manager" → right-click any device with a yellow warning icon → Update driver.
- Windows Update: Settings → Windows Update → Advanced options → Optional updates — often includes driver updates.
- Avoid third-party "driver updater" software — they are often bundled with adware. Stick to manufacturer websites and Windows Update.
If your PC still uses a spinning hard disk drive (HDD), upgrading to an SSD is by far the single most impactful hardware change you can make. Boot times drop from 1–3 minutes to under 15 seconds. Applications open instantly. The entire experience feels like a different machine.
- Check your current drive: Search "Task Manager" → Performance tab → Click "Disk 0" — it shows HDD or SSD.
- For desktops: a 500GB NVMe SSD costs under $50 and slots into the M.2 slot on your motherboard.
- For laptops: a 2.5" SATA SSD works in most models. Check your laptop's specifications before buying.
- Contact GreyFixTech for professional SSD installation and data migration if you're not comfortable doing it yourself.
03 Performance Checklist Table
A quick reference showing all actions ranked by expected improvement, difficulty, and time required.
| Action | Expected Improvement | Difficulty | Time |
|---|---|---|---|
| Disable Startup Apps | Very High | Easy | 5 min |
| Update Windows + Drivers | High | Easy | 15–30 min |
| Free Up Disk Space | High | Easy | 10 min |
| Run Malware Scan | High (if infected) | Easy | 10–60 min |
| Adjust Power Settings | High | Easy | 2 min |
| Disable Visual Effects | Medium | Easy | 3 min |
| Enable Storage Sense | Medium | Easy | 2 min |
| Switch to SSD + Add RAM | Massive | Medium | 30–60 min |
04 Advanced Tweaks
Once you've done the basics, these optional steps squeeze out additional performance — especially on older hardware.
- Disable background apps: Settings → Apps → Installed apps → click the three dots next to each app → Advanced options → toggle Background apps permission to Off. Stops apps from consuming resources when you're not using them.
- Turn off Search Indexing (if you rarely use Windows Search): Search "Indexing Options" → Modify → Remove locations you don't need indexed (like your entire C: drive). Significantly reduces background disk activity on HDDs.
- Use Microsoft PC Manager — Microsoft's official free cleanup and optimisation tool. Download it from the Microsoft Store. It shows memory usage, temp file cleanup, and startup management in one place — without the risks of third-party tools.
- Check Task Manager → Performance tab to diagnose the actual bottleneck. "Disk 100%" means your HDD is overwhelmed (SSD upgrade needed). High memory usage means more RAM would help. High CPU at idle means a background process is misbehaving — check the Processes tab and sort by CPU.
- Adjust virtual memory (page file) only if Task Manager consistently shows memory near 100%: Search "Advanced system settings" → Performance → Advanced → Virtual memory → Change. Let Windows manage it automatically unless you have a specific reason.
Diagnosing with Task Manager
Press Ctrl + Shift + Esc to open Task Manager. Click "More details" if it shows a simple view. The Performance tab gives real-time graphs for CPU, Memory, Disk, and GPU. Identify which resource is consistently at or near 100% — that's your bottleneck and tells you exactly what to address next.
05 When to Consider Hardware Upgrades
Software tweaks have limits. If your PC is still slow after completing every step above, the hardware is the bottleneck. These upgrades make a dramatic difference.
16GB is the minimum recommended for general use in 2026. If Task Manager shows memory consistently above 80%, more RAM will noticeably reduce slowdowns when multitasking or running browsers with many tabs.
16GB Minimum in 2026An NVMe M.2 SSD is 5–10x faster than a SATA SSD and 20–40x faster than a spinning HDD. If your motherboard has an M.2 slot, this is the best single upgrade you can make.
20–40x faster than HDDDust buildup on fans and heatsinks causes thermal throttling — your CPU and GPU slow themselves down to avoid overheating. A can of compressed air and 15 minutes can restore full performance. Do this every 6–12 months.
Prevents thermal throttlingKnow when to replace instead of upgrade
If your PC is more than 8–10 years old, uses a first or second generation Intel Core processor, and runs only 4GB of RAM, the cost of upgrades may exceed the value gained. A new or refurbished mid-range machine will outperform it at every task. Contact GreyFixTech for an honest assessment.
06 Maintenance Routine
Speed improvements are only sustained with regular maintenance. Set calendar reminders for these tasks.
// Weekly
- Restart the PC — don't just sleep it
- Close unused browser tabs and apps
- Empty the Recycle Bin
// Monthly
- Check for Windows updates
- Run Disk Cleanup
- Run a full malware scan
- Check Task Manager for resource hogs
// Every 6 Months
- Clean dust from inside the PC
- Audit startup programs
- Uninstall unused programs
- Check disk health (CrystalDiskInfo)
// Annually
- Check if drivers are still current
- Consider Windows feature update
- Check CPU/GPU temperatures under load
07 Common Mistakes to Avoid
- Installing random "PC cleaner" or registry optimizer software — most are ineffective, and many are malware themselves. The tools built into Windows (Disk Cleanup, Storage Sense, Task Manager) do everything you need for free.
- Ignoring Windows updates — updates fix bugs, security vulnerabilities, and performance issues. Skipping them for months leads to compounding problems.
- Running too many programs simultaneously — especially multiple browser windows with dozens of tabs. Each tab consumes RAM. Use a browser like Arc or Edge with tab sleeping features if this is a habit.
- Using outdated antivirus that hogs resources — Windows Security (built-in) is excellent and free. Heavy third-party antivirus products often cause more slowdown than the threats they prevent.
- Dismissing driver update warnings — especially graphics driver updates after a major Windows upgrade. These are often critical for stability and performance.
Your PC Should Feel Different
After applying these steps — especially startup programs, disk cleanup, and power settings — most users notice an immediate improvement in boot time and responsiveness.