Why Windows PCs slow down
Overview - what this guide covers
This pillar guide explains the most common reasons Windows PCs feel slow, how to diagnose them quickly, and when hardware upgrades are actually necessary.
The hardware myth
Many PCs with modern CPUs and 16 GB of RAM feel slow. The issue is rarely CPU power. It is usually disk pressure, startup overload, background services, or browser processes.
The real causes
- Low free space on the system drive
- Too many startup apps
- Background services and vendor utilities
- Browser tabs and extensions
- Security scans running at peak usage
What usually works
Cleaning disk space, reducing startup apps, and limiting background activity often restores responsiveness immediately, without new hardware.
How PC-Care.ai helps
The free scan identifies the biggest performance drains on your system and provides a prioritized fix list with a performance score.
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