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Search the symptom, or pick a section. Every page says what you should see at each step, so you can tell where it went wrong.

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Windows blocked the download

A blue "Windows protected your PC" box appeared instead of w0a. Here is what it means and how to check the file is really ours before you continue.

My antivirus removed the file

A security tool quarantined or deleted w0a. Why an optimizer trips these tools, and how to tell a false alarm from a real one.

Entering your licence key

Where the key goes, what happens when you press activate, and what each error means.

I changed my PC or my parts

Your key says it is already in use somewhere else. How to release it yourself from the old machine, and when to write to us instead.

What w0a collects about you

The complete list of what leaves your computer, and what stays on it. Short, because the list is short.

Reading the latency test

What the colours mean, what a good result looks like, and — the part most tools get wrong — what this number is not.

Browse by section

Guides Start-to-finish routes. What to install, in which order, and how to measure whether it worked. 1 article Installing w0a Downloading, the warnings Windows shows, and removing it again. 5 articles Licence and subscription Keys, the machine a key is tied to, changing PC, cancelling. 4 articles Something broke One card per symptom. Search what you see, press one button. 59 articles What the tweaks do Every section: what it changes, the registry path, and how to undo it. 6 articles Measurement pages Reading the latency test, the benchmark and the stutter scan honestly. 4 articles Security and privacy What leaves your computer, and how to verify the file is really ours. 3 articles Reporting a problem What to send so the first reply is an answer rather than a question. 2 articles

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What changed in every version, including what was removed and why.