Fake Windows Update Screen
A fullscreen update screen that stalls convincingly and exits the moment you press Escape.
This is a prank simulator
The line beneath the percentage.
How long the eased progression takes. It never reaches 100%.
Zero lets it crawl. Any other number freezes it there.
The preview is the real screen at a smaller size. Escape exits fullscreen at any time, and the display is kept awake while it runs.
Everything here runs on your device. Nothing you enter is uploaded or stored.
A fullscreen update screen with a spinning dot ring, a percentage that advances plausibly and never finishes, and text you can change. Escape exits immediately.
How to use it
- Choose Windows 11, 10 or 7. Each has its own background colour and layout conventions.
- Edit the headline and the warning line if you want something other than the defaults.
- Set how long the crawl should take, or pin the percentage to a fixed figure so it sits still.
- Press Start. Press Escape whenever you want out.
Real update screens stall, and that is the whole trick
The instinct when building a fake progress bar is to fill it smoothly from zero to a hundred over some duration. That produces something that reads instantly as an animation, and nobody has ever been fooled by it for a second.
Windows updates do not behave that way. They advance in lurches, sit at one number for minutes at a time, and offer no completion estimate whatsoever. The percentage is famously unrelated to remaining work — it reflects steps completed rather than time elapsed, and the steps are wildly uneven in duration. Anyone who has waited on one has watched it sit at 27 per cent long enough to make a cup of tea.
So this simulator uses a cubic ease-out curve rather than a linear ramp. It moves quickly through the first third, slows noticeably through the middle, and then crawls, approaching but never reaching a ceiling of 99 per cent. Over a thirty-minute setting it passes 50 per cent within about six and a half minutes and then spends the remaining twenty-three creeping through the last half. That asymmetry is what makes it feel real.
The ceiling matters as much as the curve. A screen that hits 100 per cent has to do something next, and there is nothing convincing for it to do. Stopping at 99 means it can run indefinitely without ever needing a resolution.
If you want it to sit completely still, pin the percentage. A frozen update screen at 32 per cent is arguably more convincing than a moving one, because it matches the experience people actually remember.
The dot ring is not a generic spinner
Windows uses a ring of five orbiting dots rather than a rotating arc, and the dots do not travel at a constant speed. They bunch together as they come over the top of the circle and spread apart as they fall, because each dot’s position is eased rather than linear.
That bunching is subtle and it is the difference between the real thing and any CSS spinner you have ever seen. This tool offsets each dot in time and applies an ease to its position, so the cluster forms and disperses the way it does on a real machine.
What it does not do
It cannot hide the browser’s own chrome on iPhone, because Safari there has no Fullscreen API — the fallback is a fixed overlay and the tool tells you so. It does not reproduce the Windows logo, since that is a trademark and drawing it would not be legitimate. It cannot block keyboard input, disable Escape, or prevent the tab being closed, and it should not be able to.
Nothing is uploaded and no permission is requested.
Style differences
| Style | Background | Progress display |
|---|---|---|
| Windows 11 | #0067b8 | Percentage in the headline only |
| Windows 10 | #0078d7 | Percentage in the headline only |
| Windows 7 | #1f1f24 | Percentage plus a determinate bar |
Progress curve over a 30-minute setting
| Elapsed | Percentage shown |
|---|---|
| 30 seconds | 5% |
| 2 minutes | 19% |
| 5 minutes | 42% |
| 10 minutes | 70% |
| 20 minutes | 95% |
| 29 minutes | 99% |
| Ever | Never 100% |
Questions
How do I get out of it?
Press Escape. That works whether the browser granted true fullscreen or fell back to a fixed overlay, and it is bound before the screen ever appears. The Exit button does the same thing if a keyboard is not to hand.
Why does the progress never reach 100 per cent?
Because a real Windows update does not advance smoothly either. It crawls, stalls at some arbitrary figure, and offers no estimate. A bar that fills evenly and completes reads as a loading animation; one that reaches 27 per cent and then creeps reads as Windows.
Does this touch my computer in any way?
No. It draws coloured pixels on a canvas inside a browser tab. It cannot install anything, cannot modify a file, and cannot prevent you closing the tab. Nothing about your system is read or changed.
Why does it look different on an iPhone?
Because Safari on iPhone has no Fullscreen API at all. The tool falls back to a fixed full-viewport overlay, which means the address bar stays visible. The hint text says so rather than leaving you wondering why it looks wrong.
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