Why your PC is slow

If your PC feels slow, the problem is usually not weak hardware. It is almost always software, configuration, or disk pressure.

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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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