SysMonitor

Real-time PC monitoring widget for Windows. A pinned, always-on-top status bar showing CPU / GPU / RAM / disk / network / processes / IP — plus a full 7-tab dashboard with hardware inventory. Built with Tauri v2 + Rust + Svelte 5.

 ┌──────────────────────────────────────────┐
 │ root@sysmon:~$                      ─  x │
 │ [OVR][CPU][MEM][GPU][NET][PROC][SYS]     │
 │──────────────────────────────────────────│
 │ root@sysmon:~$ stat --all                │
 │ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ │
 │   CPU 42% │ RAM 71% │ GPU 12% 47°C       │
 │   ▼ 1.2 MB/s    ▲ 0.1 MB/s    192.168.0.x│
 │   ╭──────────────────────────────╮       │
 │   │  █▄  ██▄   █                │       │
 │   │██  ██   █▄█ ▄██             │       │
 │   ╰──────────────────────────────╯       │
 └──────────────────────────────────────────┘

⬇️ Download

Download SysMonitor for Windows (.exe — 3.9 MB) ← click to download

Alternative formats:

System requirements: Windows 10 or 11 (64-bit), .NET Framework 4.8 (preinstalled on Win10/11). ~25 MB on disk after install.

📦 How to install

Step-by-step

1. Click Download — saves SysMonitor_2.0.0_x64-setup.exe to your Downloads folder.

2. Double-click the installer in File Explorer.

3. If you see a SmartScreen warning ("Windows protected your PC"):

   • Click "More info"
   • Click "Run anyway"
   • (This is normal — the installer isn't code-signed yet. You can verify the file by comparing its size to the one listed above.)

4. The installer runs automatically — no UAC prompt, no setup wizard. It extracts to %LOCALAPPDATA%\SysMonitor\ and exits.

5. SysMonitor launches. A thin status bar appears at the bottom-left of your primary monitor showing your CPU / RAM / GPU / network in real time.

6. (Optional) Pin it to startup: the installer adds a Start Menu entry. To auto-launch at login, right-click the SysMonitor entry in Start Menu → Open file location → drag the shortcut into shell:startup (run Win+R → shell:startup).

To get CPU temperature readings

CPU temperature requires administrator privileges for the LibreHardwareMonitor kernel driver to access AMD/Intel ring-0 thermal sensors. GPU temperature works without admin.

1. Quit SysMonitor if running (right-click tray → Quit).
2. Open File Explorer → navigate to %LOCALAPPDATA%\SysMonitor\
3. Right-click sysmonitor.exe → Run as administrator
4. Accept the UAC prompt
5. CPU temperature now shows in the bar and the CPU tab

To make admin launch persistent, create a shortcut → Properties → Advanced → check Run as administrator.

How to uninstall

• Settings → Apps → SysMonitor → Uninstall, OR
• Run %LOCALAPPDATA%\SysMonitor\uninstall.exe

Uninstall removes everything cleanly (the .exe is per-user so it does not touch other users on the machine).

Features

• CPU — usage %, per-core ASCII bars, frequency, temperature (admin required for AMD/Intel sensors)
• Memory — used/total %, top-5 RAM consumers, swap usage
• GPU — load %, temperature, VRAM (NVIDIA / AMD / Intel via LibreHardwareMonitor)
• Disk — per-drive read/write throughput, free space, SMART health flag
• Network — live throughput with ASCII chart, ping, IP, SSID, gateway, DNS, MAC
• Processes — sortable top-10 by CPU/RAM, total count, system uptime
• System inventory — motherboard, BIOS, RAM sticks, CPU, GPU models, drives, network adapters
• Compact bar — content-fit pinned strip, never auto-hides (immune to Start Menu / Win+D behavior)
• Full window — frameless 7-tab dashboard
• Tray-only mode — minimize to system tray
• Always on top, frameless, draggable, sharp edges (DWM rounded corners disabled)

Display modes

Switch from the right-click tray menu or the compact bar's right-click context menu.

Full window tabs

Tray icon menu

• Show full window — opens the 7-tab dashboard
• Show compact (AppBar) — docks above the taskbar with reserved space
• Show compact (floating) — floating bar above the taskbar
• Hide all (tray-only) — only the tray icon remains
• Always on top (toggle)
• Retry sensors — restart the hardware sensor sidecar
• About / Quit

Tech Stack

• Tauri v2 — app shell, multi-window, system tray, IPC
• Rust 1.77+ — monitoring engine, AppBar integration, Win32 DWM calls
• Svelte 5 + SvelteKit — frontend (two routes: full + compact)
• LibreHardwareMonitorLib (MPL-2.0) via C# sidecar — CPU/GPU temperatures
• sysinfo, wmi, windows — Rust crates for OS metrics
• JetBrains Mono (OFL-1.1) — bundled monospace font

Build from source

Prerequisites

• Rust 1.77+ with MSVC target (rustup default stable-msvc)
• .NET SDK 8 with net48 target (for the C# sidecar)
• Visual Studio 2022 Build Tools (C++ workload + Windows 11 SDK)
• Node.js 18+
• Windows 10/11 (target platform)

Build & run

# Install JS deps
npm install

# Build the C# sidecar binary (one-time / after sidecar changes)
./scripts/build-sidecar.ps1

# Dev mode (hot reload)
cargo tauri dev

# Production build (installer + portable exe)
cargo tauri build

Tests

cd src-tauri
cargo test
# 114 tests pass

Project Structure

src-tauri/src/
  lib.rs                # Orchestrator, 1s tick loop, system-update event
  cpu_monitor.rs        # Per-core CPU usage + frequency (sysinfo)
  cpu_temp.rs           # CPU temperature (WMI thermal zone fallback)
  memory_monitor.rs     # RAM + swap (sysinfo)
  disk_monitor.rs       # Per-drive I/O + free space (sysinfo + WMI)
  process_monitor.rs    # Top-N processes + uptime (sysinfo)
  gpu_monitor.rs        # GPU data from sidecar bridge
  network_monitor.rs    # Byte-counter delta for net throughput
  ping_monitor.rs       # ICMP ping to 8.8.8.8
  network_info.rs       # SSID, IPs, gateway, DNS, MAC, signal
  session_tracker.rs    # Totals, peaks, active connections
  event_logger.rs       # Speed drop / IP change detection
  system_info.rs        # One-shot WMI hardware inventory
  lhm_bridge.rs         # Sidecar spawn + JSON parse (tokio-based)
  appbar.rs             # SHAppBarMessage register/unregister + DWM corner pref
  corner_position.rs    # Pure corner-position math (TDD-covered)
  compact_menu.rs       # Native popup-menu layout
  settings.rs           # Persistent settings + v1 migration
  tray.rs               # System tray icon & menu
sidecar/
  Program.cs            # LibreHardwareMonitorLib wrapper (net48 + Costura)
  SysmonSensor.csproj
src/
  routes/
    +page.svelte        # Full window (7 tabs)
    compact/+page.svelte # Compact bar route
  lib/components/       # OverviewTab, CpuTab, MemTab, GpuTab, NetTab,
                        # ProcTab, SysTab, CompactBar, TitleBar, TabBar, ContextMenu
  lib/stores/system.js  # Svelte store + Tauri event listener
  lib/utils/formatting.js
  styles/               # Terminal theme CSS

Troubleshooting

• "Windows protected your PC" SmartScreen warning — normal for unsigned installers. Click "More info" → "Run anyway". Source is on GitHub; you can build from source if you prefer.
• CPU temperature shows — — you're running non-elevated. Right-click %LOCALAPPDATA%\SysMonitor\sysmonitor.exe → Run as administrator.
• GPU temperature shows — — your GPU may not be supported by LibreHardwareMonitor. Currently supports NVIDIA, AMD (discrete + most APUs), and Intel.
• Bar disappeared — left-click the SysMonitor tray icon to bring it back, or right-click → Show compact (floating).
• Bar in wrong corner — right-click the bar → choose a position preset, or just drag it.

Contributing

See CONTRIBUTING.md.

License

MIT (this project) — see LICENSE. LibreHardwareMonitorLib is MPL-2.0; the bundled DLL ships with its own license notice in the installer.

_{Built by Saqib Zahoor · WeboTech Studio}