diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 78130baf..9c0a85f2 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -39,9 +39,11 @@ jobs:
         echo "$env:GITHUB_WORKSPACE\dart-sass" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
       shell: pwsh
 
+    - name: Set timezone
+      run: tzutil /s "Eastern Standard Time"
+
     - name: Build
       run: go build main.go
 
     - name: Test
       run: go test ./...
-      continue-on-error: true  # Allow failures until Windows-specific bugs are fixed
diff --git a/collection/collection_test.go b/collection/collection_test.go
index 4259c2c8..eec020b2 100644
--- a/collection/collection_test.go
+++ b/collection/collection_test.go
@@ -1,6 +1,7 @@
 package collection
 
 import (
+	"path/filepath"
 	"testing"
 
 	"github.com/osteele/gojekyll/config"
@@ -20,7 +21,7 @@ func TestNewCollection(t *testing.T) {
 
 	c1 := New(site, "c", map[string]interface{}{"output": true})
 	require.Equal(t, true, c1.Output())
-	require.Equal(t, "_c/", c1.PathPrefix())
+	require.Equal(t, "_c/", filepath.ToSlash(c1.PathPrefix()))
 
 	c2 := New(site, "c", map[string]interface{}{})
 	require.Equal(t, false, c2.Output())
diff --git a/config/config_test.go b/config/config_test.go
index 8f057225..5a2b2add 100644
--- a/config/config_test.go
+++ b/config/config_test.go
@@ -1,6 +1,7 @@
 package config
 
 import (
+	"path/filepath"
 	"strings"
 	"testing"
 
@@ -9,7 +10,7 @@ import (
 
 func TestConfig_SourceDir(t *testing.T) {
 	c := Default()
-	require.True(t, strings.HasPrefix(c.SourceDir(), "/"))
+	require.True(t, filepath.IsAbs(c.SourceDir()) || strings.HasPrefix(c.SourceDir(), "/"))
 }
 func TestDefaultConfig(t *testing.T) {
 	c := Default()
diff --git a/pages/page_test.go b/pages/page_test.go
index 55bb8f06..e2a0e64f 100644
--- a/pages/page_test.go
+++ b/pages/page_test.go
@@ -51,7 +51,7 @@ func TestPage_Write(t *testing.T) {
 		require.Contains(t, err.Error(), "render error")
 		pe, ok := err.(utils.PathError)
 		require.True(t, ok)
-		require.Equal(t, "testdata/liquid_error.md", pe.Path())
+		require.Equal(t, "testdata/liquid_error.md", filepath.ToSlash(pe.Path()))
 	})
 
 	t.Run("layout: none", func(t *testing.T) {
diff --git a/site/site.go b/site/site.go
index 9470dfd5..9603012e 100644
--- a/site/site.go
+++ b/site/site.go
@@ -137,6 +137,10 @@ func (s *Site) KeepFile(filename string) bool {
 
 // FilePathPage returns a Page, give a file path relative to site source directory.
 func (s *Site) FilePathPage(rel string) (Document, bool) {
+	// Normalize the input path to use OS-specific separators
+	// This handles cases where templates use forward slashes (e.g., {% link _c1/c1p1.md %})
+	rel = filepath.FromSlash(rel)
+
 	// This looks wasteful. If it shows up as a hotspot, you know what to do.
 	for _, p := range s.Routes {
 		if p.Source() != "" {
diff --git a/utils/filepath_test.go b/utils/filepath_test.go
index 23a38129..c3927638 100644
--- a/utils/filepath_test.go
+++ b/utils/filepath_test.go
@@ -2,6 +2,7 @@ package utils
 
 import (
 	"os"
+	"path/filepath"
 	"strings"
 	"testing"
 	"time"
@@ -9,16 +10,9 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func timeMustParse(s string) time.Time {
-	t, err := time.Parse(time.RFC3339, s)
-	if err != nil {
-		panic(err)
-	}
-	return t
-}
-
 func TestMustAbs(t *testing.T) {
-	require.True(t, strings.HasPrefix(MustAbs("."), "/"))
+	abs := MustAbs(".")
+	require.True(t, filepath.IsAbs(abs) || strings.HasPrefix(abs, "/"))
 }
 
 func TestParseFilenameDate(t *testing.T) {
@@ -26,7 +20,9 @@ func TestParseFilenameDate(t *testing.T) {
 	d, title, found := ParseFilenameDateTitle("2017-07-02-post.html")
 	require.True(t, found)
 	require.Equal(t, "Post", title)
-	require.Equal(t, timeMustParse("2017-07-02T00:00:00-04:00"), d)
+	// The date should be 2017-07-02 at midnight in the local timezone
+	expected := time.Date(2017, 7, 2, 0, 0, 0, 0, time.Local)
+	require.Equal(t, expected, d)
 
 	_, _, found = ParseFilenameDateTitle("not-post.html")
 	require.False(t, found)
diff --git a/utils/ioutil.go b/utils/ioutil.go
index 09c8f2ee..8c056d29 100644
--- a/utils/ioutil.go
+++ b/utils/ioutil.go
@@ -68,8 +68,13 @@ func PostfixWalk(root string, walkFn filepath.WalkFunc) error {
 
 // IsNotEmpty returns a boolean indicating whether the error is known to report that a directory is not empty.
 func IsNotEmpty(err error) bool {
-	if err, ok := err.(*os.PathError); ok {
-		return err.Err.(syscall.Errno) == syscall.ENOTEMPTY
+	if pathErr, ok := err.(*os.PathError); ok {
+		if errno, ok := pathErr.Err.(syscall.Errno); ok {
+			// Check for platform-specific "directory not empty" errors
+			// Unix/Linux/macOS: ENOTEMPTY
+			// Windows: ERROR_DIR_NOT_EMPTY (checked via platform-specific helper)
+			return errno == syscall.ENOTEMPTY || isWindowsDirNotEmpty(errno)
+		}
 	}
 	return false
 }
diff --git a/utils/ioutil_test.go b/utils/ioutil_test.go
index bd9567df..e3163599 100644
--- a/utils/ioutil_test.go
+++ b/utils/ioutil_test.go
@@ -29,7 +29,10 @@ func TestCopyFileContents(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	require.Equal(t, "content\n", string(b))
+	// Normalize line endings for cross-platform compatibility
+	content := string(b)
+	// Accept either Unix or Windows line endings
+	require.True(t, content == "content\n" || content == "content\r\n", "expected 'content\\n' or 'content\\r\\n', got %q", content)
 
 	err = CopyFileContents(f.Name(), testFile("missing.txt"), 0x644)
 	require.Error(t, err)
diff --git a/utils/ioutil_unix.go b/utils/ioutil_unix.go
new file mode 100644
index 00000000..3d4eeb2b
--- /dev/null
+++ b/utils/ioutil_unix.go
@@ -0,0 +1,10 @@
+//go:build !windows
+
+package utils
+
+import "syscall"
+
+// isWindowsDirNotEmpty always returns false on non-Windows platforms
+func isWindowsDirNotEmpty(errno syscall.Errno) bool {
+	return false
+}
diff --git a/utils/ioutil_windows.go b/utils/ioutil_windows.go
new file mode 100644
index 00000000..7ccb7908
--- /dev/null
+++ b/utils/ioutil_windows.go
@@ -0,0 +1,10 @@
+//go:build windows
+
+package utils
+
+import "syscall"
+
+// isWindowsDirNotEmpty checks if the error is Windows ERROR_DIR_NOT_EMPTY
+func isWindowsDirNotEmpty(errno syscall.Errno) bool {
+	return errno == syscall.ERROR_DIR_NOT_EMPTY
+}