diff --git a/Cargo.lock b/Cargo.lock
index 84da1ff..0e11ba6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2187,7 +2187,7 @@ dependencies = [
 
 [[package]]
 name = "socktop_agent"
-version = "1.40.65"
+version = "1.40.66"
 dependencies = [
  "anyhow",
  "assert_cmd",
diff --git a/scripts/check-windows.sh b/scripts/check-windows.sh
new file mode 100644
index 0000000..719933a
--- /dev/null
+++ b/scripts/check-windows.sh
@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Cross-check Windows build from Linux using the GNU (MinGW) toolchain.
+# - Ensures target `x86_64-pc-windows-gnu` is installed
+# - Verifies MinGW cross-compiler is available (x86_64-w64-mingw32-gcc)
+# - Runs cargo clippy with warnings-as-errors for the Windows target
+# - Builds release binaries for the Windows target
+
+echo "[socktop] Windows cross-check: clippy + build (GNU target)"
+
+have() { command -v "$1" >/dev/null 2>&1; }
+
+if ! have rustup; then
+  echo "error: rustup not found. Install Rust via rustup first (see README)." >&2
+  exit 1
+fi
+
+if ! rustup target list --installed | grep -q '^x86_64-pc-windows-gnu$'; then
+  echo "+ rustup target add x86_64-pc-windows-gnu"
+  rustup target add x86_64-pc-windows-gnu
+fi
+
+if ! have x86_64-w64-mingw32-gcc; then
+  echo "error: Missing MinGW cross-compiler (x86_64-w64-mingw32-gcc)." >&2
+  if have pacman; then
+    echo "Arch Linux: sudo pacman -S --needed mingw-w64-gcc" >&2
+  elif have apt-get; then
+    echo "Debian/Ubuntu: sudo apt-get install -y mingw-w64" >&2
+  elif have dnf; then
+    echo "Fedora: sudo dnf install -y mingw64-gcc" >&2
+  else
+    echo "Install the mingw-w64 toolchain for your distro, then re-run." >&2
+  fi
+  exit 1
+fi
+
+CARGO_FLAGS=(--workspace --all-targets --all-features --target x86_64-pc-windows-gnu)
+
+echo "+ cargo clippy ${CARGO_FLAGS[*]} -- -D warnings"
+cargo clippy "${CARGO_FLAGS[@]}" -- -D warnings
+
+echo "+ cargo build --release ${CARGO_FLAGS[*]}"
+cargo build --release "${CARGO_FLAGS[@]}"
+
+echo "✅ Windows clippy and build completed successfully."
+
diff --git a/socktop_agent/Cargo.toml b/socktop_agent/Cargo.toml
index 3589a21..8bda2b1 100644
--- a/socktop_agent/Cargo.toml
+++ b/socktop_agent/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "socktop_agent"
-version = "1.40.65"
+version = "1.40.66"
 authors = ["Jason Witty <jasonpwitty+socktop@proton.me>"]
 description = "Remote system monitor over WebSocket, TUI like top"
 edition = "2021"
diff --git a/socktop_agent/src/metrics.rs b/socktop_agent/src/metrics.rs
index a758f50..9718236 100644
--- a/socktop_agent/src/metrics.rs
+++ b/socktop_agent/src/metrics.rs
@@ -454,14 +454,15 @@ pub async fn collect_processes_all(state: &AppState) -> ProcessesPayload {
                 new_name
             };
 
-            // Normalize CPU by core count (like Linux implementation)
-            let raw = p.cpu_usage();
-            let normalized_cpu = (raw / cpu_count).clamp(0.0, 100.0);
+            // Convert to percentage of total CPU capacity
+            // e.g., 100% on 2 cores of 8 core system = 25% total CPU
+            let raw = p.cpu_usage(); // This is per-core percentage
+            let total_cpu = raw.clamp(0.0, 100.0) / cpu_count;
 
             proc_cache.reusable_vec.push(ProcessInfo {
                 pid,
                 name,
-                cpu_usage: normalized_cpu,
+                cpu_usage: total_cpu,
                 mem_bytes: p.memory(),
             });
         }