System Checker

System Checker is a lightweight Windows console monitor written in C++ (OOP). It shows live system status for CPU, RAM, Disk, and Network in a single terminal dashboard.

Highlights

• Live CPU and memory usage with color-coded bars
• CPU details (logical cores, architecture)
• Disk monitoring with type, capacity, and usage
• Per-adapter network status and IP addresses
• Download/Upload rates calculated between refreshes
• Runtime control over refresh interval

What It Shows

• CPU
• Logical processor count
• CPU architecture (x64, x86, ARM64, ...)
• CPU usage percentage with colored bar
• RAM
• Physical memory: total / used / free
• Commit memory: total / used / free
• Memory usage percentage with colored bar
• Disk
• All logical drives
• Drive type (Fixed, Removable, Network, CD-ROM, ...)
• Media estimation for fixed drives (SSD/HDD when supported)
• Capacity (total / used / free) + colored usage bar
• Network
• All adapters
• Adapter status (Up, Down, ...)
• IPv4 and IPv6 addresses
• Download/Upload rate per adapter (calculated between refreshes)

Runtime Controls

• r refresh immediately
• q quit
• + increase refresh interval
• - decrease refresh interval

Default refresh interval is 60 seconds.
Allowed range is 1 to 300 seconds.

Color Rules

• >= 80% red
• >= 75% and < 80% yellow
• < 75% green

Project Layout

System_Checker.cpp              # main()
include/
  ConsoleRenderer.h
  CpuMonitor.h
  RamMonitor.h
  DiskMonitor.h
  NetworkMonitor.h
  SystemCheckerApp.h
  WsaSession.h
src/
  ConsoleRenderer.cpp
  CpuMonitor.cpp
  RamMonitor.cpp
  DiskMonitor.cpp
  NetworkMonitor.cpp
  SystemCheckerApp.cpp
  WsaSession.cpp
.vscode/tasks.json

Requirements

• Windows
• MSYS2 UCRT64 (or compatible MinGW-w64 toolchain)
• g++
• Win32 libs:
  • ws2_32
  • iphlpapi

Build (VS Code)

Use task:

• C/C++: g++.exe build active file

The task already compiles all .cpp files and outputs:

• System_Checker.exe

Build (Terminal)

C:\msys64\ucrt64\bin\g++.exe -fdiagnostics-color=always -g `
  -I "include" `
  "System_Checker.cpp" `
  "src\SystemCheckerApp.cpp" `
  "src\ConsoleRenderer.cpp" `
  "src\CpuMonitor.cpp" `
  "src\RamMonitor.cpp" `
  "src\DiskMonitor.cpp" `
  "src\NetworkMonitor.cpp" `
  "src\WsaSession.cpp" `
  -lws2_32 -liphlpapi `
  -o "System_Checker.exe"

Run

.\System_Checker.exe

Important Notes

• The first frame may show Calculating... for CPU or network rate until at least two samples exist.
• Network speed is derived from adapter counters over elapsed time between samples.
• Media detection (SSD/HDD) depends on driver support; some drives return Unknown.
• Network throughput currently uses GetIfEntry counters (dwInOctets, dwOutOctets), which are 32-bit counters; on very high traffic links, counter wrap can reduce accuracy over longer intervals.

Current Design

• OOP structure with separate monitor classes per subsystem.
• WsaSession is RAII-based for WSAStartup / WSACleanup.
• ConsoleRenderer owns console formatting concerns (sections, header, color, bars).

Suggested Next Improvements

• Switch network throughput to GetIfEntry2 (64-bit counters) when fully available in your build environment.
• Add optional logging mode (.csv / .json).
• Add sensor plugins (CPU/GPU/drive temperature).
• Add unit tests for pure utility logic (formatting, bar generation, thresholds).