Why is my PC so slow?
Speed up a slow Windows 10 or 11 computer: check what is using your CPU, RAM and disk, then fix the cause. Free scripts, 10-minute workflow.
Free tools for Windows, Mac & LinuxFix your PC yourself.
Fix your PC yourself.
Scripts you can read. Proof that they work.
Slow computer, full C drive, strange programs listening on your network. Run a free script, get a real readout, and follow the fix-it guide. Every tool is short enough to read in a couple of minutes.
6 free scripts4 fix-it guides10 free apps0 signups needed
Real output from System Report on our test machine
=== System Report === Computer : WORKSTATION OS : Microsoft Windows 11 Pro (build 26100, 64-bit) Uptime : 18.6 h --- CPU --- Model : Intel(R) Core(TM) i5-12400 CPU @ 2.50GHz Cores : 6 --- Memory --- Total : 16.00 GB In use : 14.06 GB Usage : 87.9% --- Fixed disks --- C: 476.94 GB total 214.06 GB free 55% used --- Network (IPv4, excluding loopback) --- Ethernet x.x.x.x Wi-Fi x.x.x.x Read-only report - nothing was changed on this machine.
What are you trying to fix?
Pick the problem that matches your situation. Each guide uses the free scripts on this site and shows real output at every step.
C drive full? Free up disk space
My C drive is full — find what is eating your storage, clear forgotten downloads and old backups, and get the space back safely.
What is listening on my PC?
Check open ports on Windows, Mac and Linux. See which programs accept network connections and spot anything unexpected.
Generate a strong password offline
Create secure passwords locally — never sent to a website — and store them safely in a free offline password manager.
Free scripts you can run right now
Small programs you download and run from a terminal. They print a report and change nothing on your computer. Each page shows real output from a test run, the full source code, and exactly what it can and cannot do.
Windows · Linux · macOS
System Report
Check your PC specs in Command Prompt or PowerShell — CPU, RAM, disk space and network in one free script, no install.
Windows · Linux · macOS
Disk Usage
C drive full on Windows 11? Find which folder is using the most disk space on Windows, Mac or Linux.
Windows · Linux · macOS
Large Files
Find the largest files on Windows 11, Mac and Linux — forgotten downloads, old backups, duplicate videos.
Windows · Linux · macOS
Open Ports
Check which TCP ports accept a connection on your PC — free connect-scan script, no install.
Windows · Linux · macOS
Password Generator
Generate strong passwords offline — free script, never sent to a website.
Windows · Linux · macOS
Folder Sorter
Sort and organize your Downloads folder — preview first, nothing deleted.
Best free apps
The free programs we install on our own machines — a full office suite, a media player, a password manager, a video editor and more. Each page explains what it does well, where it falls short, and how to get it.
Archives
7-Zip
The best free file archiver: opens RAR, ZIP, 7z, tar, gz, bz2, xz, iso, CAB, MSI, and over 30 others; creates .7z with LZMA2
Media
VLC media player
The best free media player for Windows, Mac and Linux: plays MKV, MP4, DVD (software decoder included), Blu-ray menus, streams
Security
KeePassXC
The best free offline password manager: AES-256/ChaCha20-encrypted .kdbx you own, plus Argon2 memory-hardened unlock, autotype
Browser
Firefox
The best free private browser for Windows, Mac and Linux: multi-account containers that isolate work and personal cookies
Image editing
GIMP
The best free photo editor for Windows, Mac and Linux: 8/16/32-bit float RGB, layers, layer masks, Python-Fu batch scripting with
Office
LibreOffice
The best free Microsoft Office alternative: Writer, Calc, Impress, Draw and Base; reads and writes DOCX, XLSX, PPTX, ODF, PDF
How these scripts work
Every script on this site does the same three things: it reads information from your computer, prints it in a readable report, and stops. Nothing is installed, nothing is sent anywhere, and nothing changes without your approval.
Real output from System Report on a test PC · hostname and IPs hidden
=== System Report === Computer : WORKSTATION OS : Microsoft Windows 11 Pro (build 26100, 64-bit) Uptime : 18.6 h --- CPU --- Model : Intel(R) Core(TM) i5-12400 CPU @ 2.50GHz Cores : 6 --- Memory --- Total : 16.00 GB In use : 14.06 GB Usage : 87.9% --- Fixed disks --- C: 476.94 GB total 214.06 GB free 55% used --- Network (IPv4, excluding loopback) --- Ethernet x.x.x.x Wi-Fi x.x.x.x Read-only report - nothing was changed on this machine.
Frequently asked questions
Are these tools really free?
Yes. Everything on this site is free to download and use, with no trial timers and no bundled extras. The scripts are small enough to read in a few minutes before you run them.
Are they safe to run?
The diagnostic scripts only read information and print it — they change nothing on your PC. The file-sorting script shows you a preview of what it would do and does nothing until you approve it. Full source code is published on every page so you can check.
What do I need to install?
Nothing. Windows PowerShell is built into every PC, and Linux and macOS already have a terminal. You download one file, open a terminal, and run it.
My PC is slow — where do I start?
Start with the Diagnose a Slow Windows PC guide. It walks through checking startup programs, memory, disk space and background processes in order, using the free scripts on this site.
Do you review paid software?
No. Everything listed here is free and open source. The recommendations page covers the best free alternatives to popular paid programs (office suites, video editors, password managers and more).
Can I use these on Mac or Linux?
Every script has a PowerShell version for Windows and a bash version for Mac and Linux. The guides note which steps differ between systems.