How to Speed Up a Slow Windows PC (Without Buying New Hardware)

Start with the real causes

Windows rarely slows down for one reason, it is usually an accumulation: too many programs launching at startup, a nearly-full drive, background apps hogging resources, or an aging mechanical hard drive. The good news is that most slowdowns are fixable for free, without new hardware. Work through the causes in order, from easiest to most impactful, and you will often recover most of the speed you remember. Reboot first, too; simply restarting clears a lot of temporary sluggishness people mistake for a permanent problem.

Cut down startup programs

The most common cause of a slow-booting, sluggish PC is too many programs launching automatically. Open Task Manager (Ctrl+Shift+Esc), go to the Startup apps tab, and you will see every program set to run at login, with a 'startup impact' rating. Disable anything you do not need starting automatically, chat apps, updaters, launchers, toolbars. This does not uninstall them; you can still open them manually. Trimming startup items is often the single biggest, easiest speed improvement, especially on machines that have collected software over the years.

Free up disk space

Windows needs free space to run well, and a drive near capacity slows everything down. Open Settings, then System, then Storage, to see what is using space and turn on Storage Sense to automatically clear temporary files. Run Disk Cleanup for a deeper sweep. Uninstall programs you no longer use (Settings, then Apps). Empty the Recycle Bin. Move large files like videos to external or cloud storage. Aim to keep a healthy chunk of your drive free; going from 'almost full' to 'comfortable' can noticeably improve responsiveness.

Check for malware and unwanted software

Sudden slowdowns, especially with pop-ups, browser weirdness, or fans spinning constantly, can signal malware or unwanted 'potentially unwanted programs.' Run a full scan with Windows Security (built into Windows) or your antivirus. Also review installed programs and browser extensions for anything you do not recognize or remember installing, bundled junk is a common cause of slowdowns. Removing malware and bloatware not only speeds things up but protects your data. If a scan finds and removes threats, reboot and re-test performance.

Tame background apps and effects

Programs running in the background consume CPU, memory, and disk even when you are not using them. In Task Manager's Processes tab, sort by CPU, Memory, or Disk to spot heavy hitters, then close or uninstall what you do not need. In Settings, you can limit which apps run in the background. If your PC is older, turning off some visual effects (Settings, search 'performance,' then 'Adjust for best performance') can help. These tweaks free up resources for the work you actually care about.

The one upgrade worth it: an SSD

If your PC still feels slow after the free fixes, and it still uses a mechanical hard drive (HDD), the single most transformative upgrade is switching to a solid-state drive (SSD). An SSD dramatically speeds up boot times, app launches, and general responsiveness, often making an old machine feel new, for a modest cost. Adding more RAM helps if you run out of memory with many tabs or apps open. But try the free fixes first; for many people, they solve the problem without spending anything at all.

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See also: SSD vs HDD: which storage should you buy?, How to safely debloat Windows 11.

Sources

• Tips to improve PC performance in Windows - Microsoft Support

Published date reflects the original event date (2026-03-05). This article is original Skillo editorial written from the sources above; facts were verified in September 2026.