One quick install. Open it whenever your PC needs a check.
A My PC Doctor ambulance carries your PC to the PC Hospital as the files copy. Under a minute, no administrator password, and nothing left running in the background except the optional weekly check.
Windows 10 and Windows 11, 64-bit and 32-bit · Windows Server 2019, 2022 and 2025
⬇ Download My PC Doctor — v1.14.1 Download the 32-bit buildMost PCs need the 64-bit build. Choose 32-bit only if your Windows is 32-bit: open Settings, then System, then About, and read System type.
MyPcDoctor-Setup-1.14.1-x64.exe · 55 MB · installs for your Windows account only, no administrator rights needed. Nothing runs in the background except the optional quiet weekly check.
Windows shows this for any new app that is not yet signed with a paid publisher certificate. It is not a virus warning. The file is the one you just downloaded from this page, and you can check it yourself against the SHA-256 below.
Open the file you downloaded
Open MyPcDoctor-Setup-1.14.1-x64.exe from your browser's download bar, or from your Downloads folder.
Press More info
Microsoft Defender SmartScreen prevented an unrecognised app from starting. Running this app might put your PC at risk.
More info
It is a small grey link, easy to miss, just under the message.
Then press Run anyway
App: MyPcDoctor-Setup-1.14.1-x64.exe
Publisher: Unknown publisher
The Run anyway button only appears after you press More info.
After that the normal installer opens. Press Install: under a minute, and no administrator password.
If the installer stops with Error 4551, or says Unable to execute file in the temporary directory, that is a different Windows feature called Smart App Control. It is not a virus warning either, and there is no Run anyway button for it: it only allows apps that are already signed and widely known to Microsoft, and My PC Doctor is too new for that.
Two ways forward. Ask your computer shop to install it for you, which is the easiest. Or switch Smart App Control off yourself: open Settings, then Privacy & security, then Windows Security, then App & browser control, then Smart App Control settings, and choose Off.
Read this before you switch it off. On Windows 11 updated in April 2026 or later you can switch it back on whenever you like. On a PC that has not had that update, switching it off is permanent until Windows is reset, and Windows will warn you of exactly that. If you are not sure, let your computer shop do it.
SHA-256, 64-bit: 4CC15C5E21F975463BF8C38117785D09067889EA93E4143FD4883974421E8CF6
SHA-256, 32-bit: 07AB6A56A2726C0E0DFEA5E9952AA84C859B4A826FA193C6F25E7A36EF047FD9
A PC that stays switched on for days now still learns about a new version: the app looks again every few hours while it runs, and again whenever you open the Dashboard or Settings if its last answer is more than an hour old. The Check button is gone; it only comes back as Try again when the app could not reach the server at all.
This build is not yet code-signed with a publisher certificate — Windows SmartScreen may show an "unrecognized app" warning on first run. This is expected until a code-signing certificate is in place; the checksum above lets you verify the file wasn't altered in the meantime.
You do not need to download anything here. When a newer version exists the app says so on its Dashboard (and under Settings → Check for updates); press Update now and it downloads the installer, verifies the checksum, installs in place and reopens. Your activation and history stay. Nothing is ever downloaded without that click.
No popups, no nagging, no tray icon. The only thing that runs on its own is the optional quiet weekly check, which tells you something only if it finds a serious problem — and it has an off switch in Settings.
Yes. The warning appears because this build is not yet signed with a paid publisher certificate. Click More info → Run anyway. To verify the file yourself, compare its SHA-256 with the one printed above (in PowerShell: Get-FileHash MyPcDoctor-Setup-1.14.1-x64.exe).
That is Smart App Control, a Windows 11 feature that only allows apps Microsoft already knows. It is not a virus warning, and unlike the blue "Windows protected your PC" screen it has no Run anyway button, so there is nothing to click past. The simplest answer is to let your computer shop install it. If you prefer to do it yourself, switch Smart App Control off in Settings → Privacy & security → Windows Security → App & browser control → Smart App Control settings. On Windows 11 updated in April 2026 or later you can switch it back on at any time; on an older build, switching it off is permanent until Windows is reset, and Windows says so before you confirm. This will stop happening once My PC Doctor is signed with a publisher certificate.
Some antivirus products block any unsigned installer from a new publisher. Open your antivirus, look for "quarantine" or "blocked items", restore the file and add it to the allowed list — or ask your computer shop to do it. My PC Doctor never asks you to turn your antivirus off.
An expired third-party antivirus often keeps Windows' own protection (Microsoft Defender) switched off, so the PC ends up with no protection at all. My PC Doctor's Protection Health page spots this and takes you to Windows' Apps & features to remove the expired product; Windows then turns Defender back on by itself. If your antivirus is active and paid up, the app leaves it alone.
Not to install or to run a check. A few repair actions (Windows' own file repair, a restore point, a Windows Update driver) ask for permission through the normal Windows prompt at the moment you press the button — never silently.
Install from here, open the app and enter the key. Your shop's name, engineer and contact numbers then appear inside the app, and your engineer can see your PC's check history when you ask for help.