Your PC takes two minutes to start, the browser freezes with three tabs open and every Windows update seems to steal a bit more speed. It is tempting to think the computer is just "old" and the only solution is to buy a new one.
In most cases that is not true. A computer slows down because over time it fills up with useless things: temporary files, programs that start on their own, leftovers of uninstalled software, drives filled to the brim. All of this can be fixed, for free, in less than half an hour.
1. Reduce the programs that start with Windows
This is the number one cause of slow startups. Every program you install tends to add itself to Windows startup: automatic updaters, game clients, chat apps, tools from printer and phone makers. Ten startup programs can add a whole minute to boot time.
Disabling them does not uninstall them: they keep working when you open them yourself. Keep only your antivirus, audio and touchpad drivers, and the file sync service you actually use.
2. Free up space on drive C
When the system drive drops below 10-15% free space, Windows slows down noticeably: there is no room left for temporary files and virtual memory. The first places to recover space are:
- Temporary files of Windows and all users
- Windows Update cache, the already-installed updates left on disk
- Browser and graphics card caches
- Recycle Bin, which often holds forgotten gigabytes
- Old Windows installations (the Windows.old folder after a major update)
3. Remove leftovers of uninstalled programs
When you uninstall a program, it almost never disappears completely. Folders remain in AppData and Program Files, registry entries, broken Start menu shortcuts and sometimes services that try to start without finding anything. These are the so-called zombie files: they take up space and, in the case of orphaned services, slow down startup.
4. Repair system files
If Windows shows strange errors, freezes or some features do not respond, some system files may be damaged. Windows has two built-in tools to repair them: SFC checks and repairs system files, DISM downloads healthy versions from Microsoft when SFC is not enough.
5. Optimise the drive and restart
On traditional hard drives (HDD), optimisation reorders files and speeds up access. On SSDs Windows runs a different, lighter operation. And then a simple but effective habit: restart your PC at least every few days. A computer that has been on for weeks piles up used memory and stuck processes.
The fastest way: do it all in one program
All these steps can be done by hand, but they require jumping between different Windows panels, hidden folders and terminal commands. PC Nuovo puts them together in one free program: deep cleaning, zombie files, startup programs with advice on what to disable, one-click Windows repair.
It has no Pro version, no ads and it never deletes anything permanently: everything it removes first goes to a Quarantine from which you can restore it.
When you really need new hardware
If the PC is still slow after cleaning, the bottleneck is almost always the drive: switching from a traditional HDD to an SSD is the upgrade that gives the biggest improvement, often more than a new computer. RAM matters too: below 8 GB, Windows 10 and 11 struggle.
Do not forget protection
A slow computer is sometimes not just full: it may be infected. Unwanted programs working in the background, malicious browser extensions and cryptocurrency miners consume resources without showing up. After cleaning up, make sure you have serious protection: without it, your PC gets slow and at risk again within weeks.