Every streamer has seen the clip: someone alt-tabs out of the game and the whole internet reads their Discord. Donation alerts, browser tabs, file names on the desktop — anything alive on your machine is one misclick from being content. The fix is a 60-second pre-live ritual.
The pre-live checklist
- Save and close everything.Not minimize — close. Minimized apps still fire notifications, still sit in the alt-tab list OBS’s window capture can land on, and still eat the RAM and CPU your game and encoder want. One click with a kill switch (below), or the manual loop in the Windows guide.
- Then open only the stream stack: game, OBS, chat, music. Everything running has a reason to be on camera.
- Silence the OS: Focus Assist / Do Not Disturb on, and check the notification source at the OS level — DND hides banners, but a bouncing Dock icon or badge still shows in a full-desktop capture.
- 30-second capture check: preview each OBS scene before going live — especially display capture, which shows everything the checklist missed.
Why closing beats hiding, specifically for streaming
- Capture safety: a closed app cannot appear in any scene, ever. A hidden one can.
- Performance:encoding + game is the heaviest thing most PCs do. Twenty background programs are frames you’re donating away — see what open programs actually cost.
- Notification zero: apps that aren’t running can’t pop anything, DND or not.
Step 1 in one click
Captain Kill Switch sits in the system tray and closes every running app in one click — clean close request first, force floor about two seconds later, OS and session processes protected by an allowlist. Click it, watch the desktop empty, then launch your stream stack. Free on Windows, macOS, and Linux — a tiny native tray app of a few megabytes, the cheapest insurance on your rig.
The fine print streamers should like: it closes unsaved work too — by design, no dialogs to babysit. Save the clip project first, then sweep.