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Microsoft PowerToys
Microsoft's own free, open-source toolbox, and the single install that fixes the most small irritations at once. Command Palette is a fast keyboard launcher for apps, commands and tools; FancyZones snaps windows into layouts far beyond Windows' built-in snapping; PowerRename does bulk renames with regex and undo.
The less obvious modules earn their keep too. File Locksmith tells you which process is holding a file you cannot delete, Text Extractor copies text from anything on screen, and Keyboard Manager remaps keys without registry hacks. Switch off the modules you will never use and the rest stays quiet in the tray. New releases arrive every couple of months, so expect the settings page to keep growing.
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Everything (software)
Type part of a filename and the match appears as you type, across every local drive. That is the whole pitch, and nothing in Windows itself comes close.
Everything indexes names rather than contents, which is why it is so quick: a fresh Windows 11 install of around 250,000 files takes about five seconds and roughly 35 MB of memory. On NTFS it keeps itself current from the drive's change journal, so the index is right even after a reboot. Content search exists but is slow, because contents are not indexed; for finding that spreadsheet someone saved somewhere odd, though, it is the first thing to install.
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Process Explorer
Task Manager tells you something is busy; Process Explorer tells you what and why. Written by Mark Russinovich and published by Microsoft as part of Sysinternals, it shows every process with its owning account, and its lower pane lists the handles and DLLs each one has open or loaded.
The search box is the reason to install it: type a filename and it shows which process has that file locked. It is a single executable with no installer, so it can live on a USB stick or run straight from Microsoft's Sysinternals Live share. Current builds list Windows 11 and Windows Server 2019 or later as supported.
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Sysinternals
Autoruns
The honest answer to "why is this PC slow to start?" Autoruns lists everything set to launch at boot or sign-in: Run keys, startup folders, services, scheduled tasks, Explorer shell extensions, drivers and more, far beyond what Task Manager's Startup tab shows.
Tick Hide Signed Microsoft Entries and what remains is the third-party clutter worth questioning. Untick an entry to disable it rather than delete it, so a mistake is easy to undo. It can also check signatures and look up file hashes on VirusTotal. This is the tool that replaces every paid startup optimizer.
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7-Zip
Windows can open a zip, but the moment someone sends a 7z, a tar or a split archive you need a real archiver. 7-Zip is it: small, mostly LGPL-licensed, free to use, and with no trial nag to click through.
Its own 7z format, using LZMA and LZMA2, squeezes files harder than zip, and even when you stick to zip, the project reports ratios 2 to 10 percent better than PKZip and WinZip. The right-click menu entries do most of the work, so the plain, old-fashioned main window rarely needs opening. Check for new versions now and then, because security fixes only reach you when you install them.
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Windows Package Manager
Not something you install so much as something you start using: WinGet ships with Windows 11 and modern Windows 10 as part of App Installer. It is the quickest way to put the rest of this list on a new machine, without hunting through download pages that bury the real button among ads.
winget search finds a package, winget install fetches it, and winget upgrade --all brings everything current in one pass. The export and import commands matter most when rebuilding: save your app list from the old PC and replay it on the new one. Packages come from a community repository, so read what you are installing before running it from an administrator prompt.
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Notepad++
The text editor for config files, logs and scripts when a full development environment is overkill. Notepad++ is free and GPL-licensed, built on the Scintilla editing component and written against the plain Win32 API, so it stays light and quick to open. Tabs, syntax highlighting and regex search cover nearly every quick edit.
One thing to know before trusting it on a work machine: in 2025 attackers who compromised the project's hosting provider redirected some update requests to malicious downloads. The updater now verifies the signature and certificate of each installer it fetches, and the project told anyone on an older version to reinstall manually from the official site. Do that once, then let it update.
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ShareX
Snipping Tool covers a quick grab. ShareX covers everything after it: region, window and scrolling captures, screen recording, text recognition from a capture, and an after-capture pipeline that can annotate, save, copy and upload in one keystroke.
It is free, open source, carries no ads and needs no account. The catch is the settings window, which is enormous and can feel like configuring a server. Set a hotkey, pick where captures are saved, and turn off any upload destination you do not want, which matters on a machine that handles anything confidential. After that it simply works.
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WizTree
When the drive fills up, WizTree answers "where did it all go?" in seconds rather than minutes. On NTFS it reads the Master File Table straight off the disk instead of walking every folder, then shows a sortable tree and a treemap where the biggest blocks are the files worth deleting.
Mind the license: it is free for personal use, but commercial use needs a paid supporter code. For an office PC where that is a problem, the open-source WinDirStat does the same job.
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WinDirStat
The disk analyzer to use where licenses matter. WinDirStat is open source, works offline and shows no ads, and its colored treemap still makes oversized folders obvious at a glance.
For years it was the slow option, essentially frozen since the mid-2000s. The 2.x rewrite that began in 2024 changed that, and version 2.5 added direct scanning of the NTFS Master File Table, the same trick that made WizTree's name, plus a dark mode. If you dismissed it a decade ago, it is worth a second look.
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FreeFileSync
For keeping a backup drive, a NAS share or a second PC in step without a subscription. FreeFileSync compares two folders, shows exactly what differs, and copies only the differences, in Two way, Mirror or Update mode.
The comparison screen is the safety net: you see every file it plans to copy or delete before anything happens, which is what stops a mirror job from wiping the wrong side. Its companion RealTimeSync can rerun a saved job when a folder changes. It is open source, and the installer dropped bundled offers years ago, though older warnings about it still circulate.
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AutoHotkey
When a job is repetitive enough to annoy you but too small for a proper program, AutoHotkey handles it. This free, open-source scripting language for Windows lets you define keyboard and mouse hotkeys, remap keys and buttons, and expand short abbreviations into whole blocks of text.
A three-line script that types a standard reply, or a hotkey that fills a form you fill twenty times a day, pays for the learning curve within a week. Start with version 2: its syntax is cleaner than the original, but older forum examples are often written for version 1 and will not run unchanged. PowerToys' Keyboard Manager is enough for simple remaps; reach for this when you need logic.
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Rufus (software)
Sooner or later a machine will not boot, and you will need a USB installer or a rescue stick made from an ISO. Rufus is the tool for it: a single executable with no installation, GPL-licensed, and quick to turn a downloaded image into a bootable drive.
When writing Windows 11 media it can apply setup customizations first, and recent releases have refined the options for removing OneDrive and checking the local account name. Keep a portable copy on a stick alongside Process Explorer and Autoruns, and the next broken PC starts with the right tools on hand.
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Hwinfo
Is that fan noise heat, a failing sensor or just a busy browser? HWiNFO's Sensors window answers it, with live temperatures, voltages, fan speeds and clock speeds for nearly every component, and the option to log readings over time to catch a fault that only appears after an hour.
The full hardware report is just as useful when you need an exact motherboard model or memory part number without opening the case. A portable version runs without installing. Check the license before rolling it out at work: the free version is for personal use, and commercial use needs a paid commercial Pro license.
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