Questions and answers

A free Windows 10/11 tool for monitoring, diagnostics, optimization and a security overview. It doesn't just show that a PC is slow, it explains why: the diagnosis separates measured observations, likely causes and unconfirmed hypotheses, and names the programs responsible. It runs locally and never makes up a value; what cannot be measured is shown as Not available.

Nothing. Nexus-DEV-Tool is a private project by Suckiii, not a company. The licence is PolyForm Noncommercial 1.0.0: you may use, modify and share it for noncommercial purposes. Commercial use needs the author's permission; ask at [email protected].

It is a beta. Everything described is built and covered by automated tests, but many functions, including most of what is new in 0.6.2, have not yet been verified on real hardware. Expect rough edges and please report what you find on Discord.

Windows 10 and 11, 64-bit. The installer is about 10 MB and installs Microsoft's WebView2 runtime if it is missing. The app comes in English and German: it follows your Windows display language, and you can switch at any time in the settings.

Nexus is available to members of the Nexus-DEV-Tool Discord server. On this website, open the Download page and choose “Sign in with Discord to download”: Discord asks you to confirm, you join the server if you are not a member yet, and the download starts after a membership check. On Discord, the installer is attached to the release post in the announcements channel. Compare the SHA-256 checksum on the Download page before you install. Never install Nexus from any other source; the team never sends installers by direct message.

Because the installers are not code-signed yet. Windows then shows a SmartScreen warning (More info, then Run anyway) and the administrator prompt says Unknown publisher. This is expected for unsigned software and says nothing about the file itself. Only use the installer from the Download page of this website or from the release post in the announcements channel on Discord, and compare the SHA-256 checksum.

System data is measured and stored only on your PC. There is no telemetry and no account is required. Data is only transmitted by features you use, for example the optional VirusTotal lookup sends a file's SHA-256 checksum, and the file itself only after you confirm it. At most once a day Nexus asks its server for the latest version and for signed detection lists; nothing about your PC is sent and you can switch this off in the settings. The privacy page lists every case.

No. Nexus is not an antivirus and does not replace one. Protection comes from Microsoft Defender or the antivirus you have installed; Nexus shows and explains their status. A result of nothing found never means that a file or a PC is clean. Nexus never switches off or weakens Defender.

Not for normal use. The app runs with standard user rights. The installer asks for administrator rights once because it installs for all users. There is an optional administrator mode for functions that Windows only allows with those rights. It is off by default and you have to switch it on yourself.

No. Every action that changes the system needs your confirmation and is written to a local audit log; where possible it can be undone. There is deliberately no registry cleaner, no RAM booster and no one-click optimize button.

Windows does not provide the CPU temperature by itself, and Nexus never invents values: what cannot be measured is shown as Not available. CPU temperature and power need the optional sensor component, which uses the signed open-source driver PawnIO through a small read-only service. It is installed only after you confirm it and can be removed at any time. You can enable it on the Hardware page.

Search the feedback forum on Discord first. If your topic is new, create a post with the tag Bug or Feature request. For a bug, include your Nexus version, Windows version and build, what you did, what you expected and what happened. Security vulnerabilities never go into public channels: open a ticket with the category Security concern, or write to [email protected].