Canary

Your PC is fine.
Are you sure?

Free Windows diagnostics that reads what your hardware actually reports — and tells you plainly what it means.

Download free150 KB · Windows 10/11 · nothing installed
The Canary app after a scan: a red bird, and findings showing an unexpected shutdown and an SSD that has used 23% of its spare blocks at 0% wear.
A real scan on a real machine. Only the computer name is edited out. One window — no account, no subscription, nothing left running when you close it.

Why it exists

Samsung’s own tool called this drive Good.

0

unrecoverable read errors

Data the drive could no longer hand back. Not slow — gone.

0%

of its spare blocks used up

At zero percent wear. The drive wasn’t worn out. It was breaking.

Vendor tools report a pass/fail flag. Canary reads the counters underneath it — and tells you what they mean.

What it looks at.

Failing drives

Reads the counters inside the drive itself — not the pass/fail badge a vendor tool shows you.

Silent crashes

Finds the freezes Windows records but never puts in Event Viewer. Most tools never look here.

Why it boots slowly

Every startup program, in plain words, with what actually happens if you turn it off.

Signs of compromise

The specific ways malware stays on a PC: hijacked sign-ins, disabled antivirus, hidden tasks.

Your attack surface

What an attacker on your network could reach — exposed Remote Desktop, SMBv1, open ports.

Files quietly in the cloud

Whether your Desktop and Documents actually live on this PC, or in OneDrive without you asking.

Download freeScanning changes nothing. Nothing is applied unless you tick it and confirm.

Four things it refuses to do.

Every one of these is standard in paid “PC optimizers”. All four are placebo at best.

Clean your registry

Unused keys cost nothing. Deleting a live one breaks something weeks later.

“Free up” your RAM

Windows caches on purpose. Emptying it makes the next few minutes slower.

Disable services in bulk

The ones that matter break in ways you will never trace back.

Promise “30% faster”

A number with no method behind it is marketing. Be sceptical of any tool that shows one.

If you think you’ve been hacked

Before you wipe the whole machine.

Reinstalling Windows costs you a day. Not reinstalling, when something really is on there, costs more. Canary looks for the specific ways malware stays on a PC — so the decision is based on something.

And the honest limit

It can raise suspicion. It cannot prove a PC is clean — anything running at kernel level hides from it.

So findings mean something. An absence of findings does not. If you have real reason to think you were hacked, reinstall — and this scan should not talk you out of it.

Find out what your PC isn’t telling you.

Takes about a minute. Nothing is installed, and nothing keeps running afterwards.

Download free

Free · no account · alpha

Found a bug, or something it got wrong? Tell me on Discord — especially if it warned about something you know is fine.