How to Fix Windows 11 Slow Performance

Why is Windows 11 running slow?

Slow performance is usually caused by a combination of startup bloat, background apps, disk fragmentation on HDDs, outdated drivers, or malware. Before replacing anything, work through the steps below in order — most PCs improve dramatically after steps 1–5.

Step 1: Restart properly (no, really)

Windows "Fast Startup" often keeps the kernel hibernated, so a plain shutdown is not a real reboot. Choose Start → Power → Restart. If your PC feels slow after days of uptime, check Task Manager's Up time and restart weekly.

Step 2: Disable startup programs

1. Press Ctrl+Shift+Esc to open Task Manager.
2. Go to the Startup apps tab (Windows 11) or Startup (Windows 10).
3. Sort by Startup impact and disable anything you don't need at boot (cloud sync apps, chat apps, updaters).

Step 3: Free up disk space

Open Settings → System → Storage and enable Storage Sense. Then run Disk Cleanup as administrator, or use the modern tool:

• Open Settings → System → Storage → Temporary files and remove the suggested items.
• Keep at least 15–20% of your system drive free. A full SSD loses speed and lifespan.

Step 4: Check for resource hogs

Open Task Manager and sort the Processes tab by CPU, then Memory. Common culprits include browsers with 50+ tabs, antivirus real-time scans, and Windows Search indexing a new drive. If System or Windows Defender constantly eats CPU, let indexing finish overnight or run a malware scan (see below).

Step 5: Update Windows and drivers

Go to Settings → Windows Update → Check for updates. Outdated graphics or chipset drivers are a top cause of stutter. Install the manufacturer's driver tool (NVIDIA GeForce Experience, AMD Adrenalin, or Intel Driver & Support Assistant) rather than relying on Windows Update alone.

Step 6: Scan for malware

Run Windows Security → Virus & threat protection → Quick scan, then a full scan. For a second opinion, use the free Malwarebytes scanner from our Download Center. Cryptominers and adware are notorious for "mysterious" slowdowns.

Step 7: Tune visual effects

1. Press Win+R, type sysdm.cpl and press Enter.
2. On the Advanced tab, under Performance, click Settings.
3. Choose Adjust for best performance or manually keep only what you like.

Step 8: Disable transparency effects

Settings → Personalization → Colors → Transparency effects → Off. On budget PCs this alone can visibly smooth out window dragging.

Step 9: Reset or clean install

If everything above fails, try Settings → System → Recovery → Reset this PC and choose "Keep my files". As a last resort, a clean install of Windows 11 from USB almost always restores factory-fast performance.

Still slow? We can help

Our technicians run a remote PC tune-up that typically restores snappy performance in under an hour. Book a PC optimization session or message us on WhatsApp.