What is a fake windows update?
A fake Windows update screen is a web page that imitates the update installer, showing a percentage that climbs slowly and never completes.
The percentage climbs slowly, pauses at the numbers real updates pause at, and never reaches the end. Put it fullscreen on a colleague’s machine and the effect is immediate, because everyone has waited on this screen before and everyone knows they cannot rush it.
How do you use the fake windows update?
Press fullscreen so the browser and taskbar disappear, then walk away. Press Escape twice to exit when the joke has landed.
- Press the fullscreen button so the browser interface and the taskbar are completely hidden.
- Walk away. The counter advances on its own and stalls convincingly.
- Press Escape twice to exit — once to leave fullscreen, once to dismiss.
Is a fake Windows update screen a virus?
No. It is an ordinary web page drawing a picture of an update. Nothing is downloaded, installed or changed on the computer.
This matters because real scareware imitates system screens too. The difference is what happens when you close it: this page leaves nothing behind, cannot prevent you closing the tab, and never asks for money, credentials or a download. If a page claiming to be a prank does any of those things, it is not a prank.
How do I exit the fake update screen?
Press Escape twice. The first press leaves fullscreen and the second dismisses the page. Alt+Tab and the task switcher also work normally.
The page cannot block input outside the browser, so the keyboard shortcuts you already know all still work. It is a picture, not a lock screen.
Will this actually stop someone using their computer?
No. It only covers the browser window. Alt+Tab, the Windows key and the task switcher all still work as normal.
Anyone who tries a keyboard shortcut escapes it in a second. The prank works on the assumption that people wait for updates rather than fight them.
Which Windows versions does it imitate?
The modern Windows 10 and 11 update style: a centred spinner, a percentage, and the warning not to turn off your computer.
There is a macOS-styled version if the prank needs to match the machine, and a blue screen of death if you would rather imply a crash than an update.
Why does the percentage stall instead of counting smoothly?
Because real updates stall. A counter that climbs evenly to 100% is the detail that gives most fake update screens away.
This one pauses at the numbers real installers pause at and never reaches the end at all.
Does this cost anything or need an account?
No. Every tool here is free, needs no sign-up, and runs in the browser with nothing to install and nothing stored.
There are no accounts, no paywalled sizes and no watermarks on downloads. See the full list of screen tools.
Will my screen stay awake while it runs?
Yes, with Keep awake switched on. It holds a browser wake lock so the display stays lit with no input until you leave.
Useful when a screensaver or clock is meant to run unattended. The lock is released as soon as you close the page.
Put this on your site
The embeddable version drops the page around it and runs the tool on its own.