Short, direct answers to the setup and troubleshooting questions people actually search for, followed by full step-by-step instructions.
Recent Windows 11 builds can extract 7Z archives from File Explorer: right-click the file and choose Extract All. If that option is missing or the archive is encrypted, install 7-Zip and use its right-click menu instead.
Windows
macOS cannot open RAR archives on its own. Install Keka or The Unarchiver from the developer's site or the Mac App Store, set it as the handler for .rar files, then double-click the archive.
Mac
Windows 11 cannot add a password to a ZIP archive by itself. Use 7-Zip: right-click your files, choose 7-Zip > Add to archive, set the format, and enter a password with AES-256 encryption.
Windows
In 7-Zip's Add to archive dialog, use the "Split to volumes, bytes" field and enter a size such as 25M or 1900M. Send every resulting part; the recipient extracts by opening the .001 file.
Windows · Mac
On Windows, run certutil -hashfile filename SHA256 in Command Prompt. On macOS, run shasum -a 256 filename in Terminal. Compare the output with the value published by the developer — they must match exactly.
Windows · Mac
Confirm you are on the developer's own domain, check the installer's digital signature, verify the published checksum when one exists, and read every setup screen for bundled offers before clicking Next.
Windows · Mac
Pick one manager, create a long passphrase you never reuse, turn on two-factor authentication, import your browser-saved passwords, then replace reused passwords starting with email and banking.
Windows · Mac
Download the official Windows 11 ISO from Microsoft, open Rufus, select your USB drive and the ISO, choose GPT with UEFI, then click Start. The drive is erased completely.
Windows
Open Settings > System > Storage for a category breakdown, or install Everything and search size:>1gb to list every large file on your drives instantly.
Windows
Drag the app from Applications to the Trash for a basic removal, or use AppCleaner to also delete the preference, cache, and support files the app leaves in your Library folder.
Mac
Windows 11 and 10 cannot open RAR archives without extra software. Install 7-Zip, WinRAR, or PeaZip, then right-click the .rar file and choose Extract to open it.
Windows
Right-click any file or folder in File Explorer and choose Compress to ZIP file to create a ZIP archive with no extra software. For higher compression or other formats, install 7-Zip.
Windows
Open Settings > Apps > Installed apps, find the program, click the three-dot menu, and choose Uninstall. For leftover files and registry entries, follow up with a dedicated uninstaller like Revo Uninstaller.
Windows
Press Windows key + Alt + R to start the built-in Xbox Game Bar recorder for quick clips. For full-screen recording, webcam overlays, or streaming-quality output, use OBS Studio instead.
Windows
Press Windows key + Shift + S to open the Snipping Tool's region selector, capture the area you want, then paste it wherever you need it. It is copied to your clipboard automatically.
Windows
Use HandBrake, a free open-source converter, to change a video's format, resolution, or file size on Windows 11 or 10. Open the source file, pick a preset, and click Start Encode.
Windows
Use PDF24 Creator, a free Windows tool, to combine multiple PDFs into one file: open its Merge PDF tool, drag your files into order, and save the combined document.
Windows
Press Windows key + R, type msinfo32, and press Enter to see a full summary of your CPU, memory, and OS build in Windows's built-in System Information tool. For deeper hardware detail, use HWiNFO or Speccy.
Windows
Open Process Explorer, press Ctrl + F, type part of the file or folder name, and it lists every process holding a handle to it. You can then close the handle or end the process that is locking the file.
Windows
Install HWMonitor or HWiNFO and read the CPU package and GPU sensors while the PC is under load. Anything sustained under roughly 85 °C on a laptop CPU and 80 °C on a desktop GPU is normal; throttling and shutdowns come from sustained higher readings.
Windows
Run netstat -ano in an elevated Command Prompt to list every listening port with the owning process ID, then match the PID in Task Manager. To scan another machine you own, use Nmap.
Windows
Task Manager's Startup apps tab covers the obvious entries. For the full picture — services, scheduled tasks, drivers and shell extensions — use Autoruns from Sysinternals and disable rather than delete.
Windows
Install Notepad++, then add the Compare plugin from Plugins > Plugins Admin. Open both files, press Alt + D, and differences are highlighted line by line in a side-by-side view.
Windows
Install Postman for Windows, create a request, choose the HTTP method, paste the endpoint URL, add any headers or auth, and click Send. Save it into a collection so you can rerun it later.
Windows
Install Wireshark with Npcap, pick the network adapter carrying your traffic, start the capture, reproduce the problem, then stop and narrow the result with a display filter such as http or ip.addr==192.168.1.10.
Windows
Enable virtualization in the BIOS, install WSL 2 with wsl --install, then install Docker Desktop and keep the WSL 2 backend selected. Verify with docker run hello-world in a terminal.
Windows
Install Git for Windows from git-scm.com, keep Git Credential Manager enabled, then set your name and email with git config --global. Choose the checkout-as-is line-ending option if you work with teammates on other platforms.
Windows
Extract an FFmpeg build, add its bin folder to PATH, then run ffmpeg -i input.mp4 -c copy -ss 00:01:00 -t 00:00:30 clip.mp4 to cut without re-encoding, or drop -c copy to convert with a new codec.
Windows