Autoruns is a free Sysinternals utility that shows every program, driver, service, scheduled task and shell extension configured to start automatically on Windows. Instead of the short list in Task Manager, it audits more than a dozen autostart locations in one window, from Registry Run and RunOnce keys to AppInit DLLs, Winlogon notifications, Winsock providers and image hijacks. Its workflow is straightforward: run the tool, refresh the scan, then filter results by category using the tabs across the top. Select any entry to open the file's properties or jump straight to the Registry location that creates it, then uncheck a box to disable the item or delete it outright. That makes boot-time behaviour visible and editable rather than a mystery.
Where Autoruns earns its place is in troubleshooting. A slow sign-in, a mystery tray icon or a browser toolbar that reappears after removal usually traces back to an autostart entry that no normal settings screen displays. Blank-slate comparisons help too: because each tab lists empty locations as well as populated ones, you can see which hooks are unused on a healthy machine and spot ones that appeared later. Administrators use it to audit a fleet before imaging, to confirm patch or agent deployments, and to check for persistence left behind by unwanted software. If you already tune Windows with PowerToys, Autoruns is the natural companion for the startup layer those tweaks do not touch.
The payoff from Autoruns is certainty. Windows spreads autostart configuration across the Registry, the file system, task scheduler, services database and several DLL injection points, and most tools expose only a slice of that. Autoruns collects all of them in a single, sortable view with the publisher, description, signer and timestamp attached to each row, so a suspicious executable stands out without guesswork. Built-in filters let you hide signed Microsoft entries and concentrate on third-party additions, while optional signature verification and VirusTotal hash lookups flag unsigned or previously unknown files. Every change is reversible: unticking an entry disables it without deleting the configuration, so you can reboot, observe the effect and restore it if something breaks. Reading the same data across other user accounts or an offline Windows installation turns the tool into a lightweight forensic and audit instrument, and the command-line companion exports the whole inventory for reporting.
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