How to Disable Startup Boost in Microsoft Edge on Windows

What Startup Boost actually does on your PC

Startup boost is a speed trick with a simple exchange: Edge pre-loads its core processes while you are still typing your password at the Windows sign-in screen, so the first window opens with no cold-start delay. After you close the browser, a handful of msedge.exe processes stay alive in the background, keeping the engine warm for the next launch. The feature also writes Microsoft Edge into the Task Manager's Startup apps list, because something has to trigger that warm-up at every sign-in. The cost is memory: on a typical machine the parked processes hold a few hundred megabytes of RAM around the clock.

Whether that trade is worth it depends on how you use Edge. People who open the browser dozens of times a day, or run Windows from an old hard drive, feel the benefit; everyone else mostly pays the RAM bill. Windows 11 on an SSD launches Edge in about a second anyway, so living without the boost costs you almost nothing.

• Pre-loads Edge's core processes during Windows sign-in — RAM traded for a faster first launch
• Keeps several msedge.exe alive after you close the last window, so the next start feels instant
• Registers Microsoft Edge in Task Manager's Startup apps list (Ctrl+Shift+Esc → Startup apps)
• Holds a slice of RAM at all times — the standing price of that speed
• Pays off mostly on HDD machines and for people who launch Edge constantly
• Quietly re-enables itself after some Edge updates — a known behavior, not a glitch on your PC

Turning Startup Boost off, step by step

Open Edge and type edge://settings/system in the address bar (or take the long way: three-dot menu → Settings → System and performance). At the top of the page, flip “Startup boost” to off — the entry removes itself from the Startup apps list, no reboot required. While you are there, decide about the second switch on the same page: “Continue running background extensions and apps when Microsoft Edge is closed”. Turning that one off as well is what actually stops msedge.exe from lingering after you quit the browser.

Then verify. Close all Edge windows, press Ctrl+Shift+Esc and scan the Processes list for msedge.exe — with both switches off, they are gone within seconds of quitting. The first launch after the change starts a little slower, once; after that Edge behaves like any normal app: it starts when you start it and stops when you stop it. Nothing else changes — favorites, passwords, extensions and history ignore both switches.

When Edge turns it back on by itself

Microsoft has a documented habit of re-enabling Startup boost after major Edge updates: the browser updates itself silently, and the switch comes back on. If you notice msedge.exe multiplying again, open edge://settings/system and check the page top to bottom instead of assuming you clicked wrong. On company-managed machines the setting may show “managed by your organization”, which means a Group Policy pins it and the local toggle is cosmetic — that is a conversation for your IT department, not a bug.

The switch itself is a one-time job; startup hygiene is a habit. After every big Edge or Windows update, spend ten seconds in Task Manager's Startup apps list and disable whatever should not be living there — the Startup impact column shows what each entry costs. For the rest of the debris browsers leave on a PC — caches, temp files, update leftovers — Kleaner PRO runs the cleanup on a schedule while leaving cookies, passwords and profiles alone.

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