diff --git a/src/ms-sys/br.c b/src/ms-sys/br.c
index e03e201d..1ea0caac 100644
--- a/src/ms-sys/br.c
+++ b/src/ms-sys/br.c
@@ -169,123 +169,126 @@ int is_zero_mbr(FILE *fp)
 	/* Don't bother to check 55AA signature */
 } /* is_zero_mbr */
 
+/* Handle nonstandard sector sizes (such as 4K) by writing
+   the boot marker at every 512-2 bytes location */
+static int write_bootmark(FILE *fp)
+{
+	unsigned char aucRef[] = {0x55, 0xAA};
+	int pos = 0x1FE;
+
+	/* We use fp->_bufsiz as our sector size indicator */
+	for (pos = 0x1FE; pos < fp->_bufsiz; pos += 0x200) {
+		if (!write_data(fp, pos, aucRef, sizeof(aucRef)))
+			return 0;
+	}
+	return 1;
+}
+
 int write_dos_mbr(FILE *fp)
 {
    #include "mbr_dos.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0, mbr_dos_0x0, sizeof(mbr_dos_0x0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 } /* write_dos_mbr */
 
 int write_95b_mbr(FILE *fp)
 {
    #include "mbr_95b.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0,   mbr_95b_0x0, sizeof(mbr_95b_0x0)) &&
       write_data(fp, 0x0e0, mbr_95b_0x0e0, sizeof(mbr_95b_0x0e0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 } /* write_95b_mbr */
 
 int write_2000_mbr(FILE *fp)
 {
    #include "mbr_2000.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0, mbr_2000_0x0, sizeof(mbr_2000_0x0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 } /* write_2000_mbr */
 
 int write_vista_mbr(FILE *fp)
 {
    #include "mbr_vista.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0, mbr_vista_0x0, sizeof(mbr_vista_0x0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 } /* write_vista_mbr */
 
 int write_win7_mbr(FILE *fp)
 {
    #include "mbr_win7.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0, mbr_win7_0x0, sizeof(mbr_win7_0x0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 } /* write_win7_mbr */
 
 int write_rufus_mbr(FILE *fp)
 {
    #include "mbr_rufus.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0, mbr_rufus_0x0, sizeof(mbr_rufus_0x0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 } /* write_rufus_mbr */
 
 int write_reactos_mbr(FILE *fp)
 {
    #include "mbr_reactos.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0, mbr_reactos_0x0, sizeof(mbr_reactos_0x0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 } /* write_reactos_mbr */
 
 int write_kolibri_mbr(FILE *fp)
 {
    #include "mbr_kolibri.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0, mbr_kolibri_0x0, sizeof(mbr_kolibri_0x0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 } /* write_kolibri_mbr */
 
 int write_syslinux_mbr(FILE *fp)
 {
    #include "mbr_syslinux.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0, mbr_syslinux_0x0, sizeof(mbr_syslinux_0x0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 } /* write_syslinux_mbr */
 
 int write_grub_mbr(FILE *fp)
 {
    #include "mbr_grub.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0, mbr_grub_0x0, sizeof(mbr_grub_0x0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 }
 
 int write_grub2_mbr(FILE *fp)
 {
    #include "mbr_grub2.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0, mbr_grub2_0x0, sizeof(mbr_grub2_0x0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 }
 
 int write_zero_mbr(FILE *fp)
 {
    #include "mbr_zero.h"
-   unsigned char aucRef[] = {0x55, 0xAA};
 
    return
       write_data(fp, 0x0,   mbr_zero_0x0, sizeof(mbr_zero_0x0)) &&
-      write_data(fp, 0x1FE, aucRef, sizeof(aucRef));
+      write_bootmark(fp);
 } /* write_zero_mbr */
diff --git a/src/rufus.rc b/src/rufus.rc
index c922c428..7ff4679c 100644
--- a/src/rufus.rc
+++ b/src/rufus.rc
@@ -32,7 +32,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
 
 IDD_DIALOG DIALOGEX 12, 12, 242, 376
 STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
-CAPTION "Rufus 2.2.668"
+CAPTION "Rufus 2.2.669"
 FONT 8, "Segoe UI", 400, 0, 0x1
 BEGIN
     LTEXT           "Device",IDS_DEVICE_TXT,9,6,200,8
@@ -157,7 +157,7 @@ END
 
 IDD_DIALOG_XP DIALOGEX 12, 12, 242, 376
 STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
-CAPTION "Rufus 2.2.668"
+CAPTION "Rufus 2.2.669"
 FONT 8, "MS Shell Dlg", 400, 0, 0x1
 BEGIN
     LTEXT           "Device",IDS_DEVICE_TXT,9,6,200,8
@@ -283,7 +283,7 @@ END
 IDD_DIALOG_RTL DIALOGEX 12, 12, 242, 376
 STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_RTLREADING | WS_EX_APPWINDOW | WS_EX_LAYOUTRTL
-CAPTION "Rufus 2.2.668"
+CAPTION "Rufus 2.2.669"
 FONT 8, "Segoe UI", 400, 0, 0x1
 BEGIN
     LTEXT           "Device",IDS_DEVICE_TXT,9,6,200,8
@@ -415,7 +415,7 @@ END
 IDD_DIALOG_RTL_XP DIALOGEX 12, 12, 242, 376
 STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_RTLREADING | WS_EX_APPWINDOW | WS_EX_LAYOUTRTL
-CAPTION "Rufus 2.2.668"
+CAPTION "Rufus 2.2.669"
 FONT 8, "MS Shell Dlg", 400, 0, 0x1
 BEGIN
     LTEXT           "Device",IDS_DEVICE_TXT,9,6,200,8
@@ -671,8 +671,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 2,2,668,0
- PRODUCTVERSION 2,2,668,0
+ FILEVERSION 2,2,669,0
+ PRODUCTVERSION 2,2,669,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -689,13 +689,13 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "Akeo Consulting (http://akeo.ie)"
             VALUE "FileDescription", "Rufus"
-            VALUE "FileVersion", "2.2.668"
+            VALUE "FileVersion", "2.2.669"
             VALUE "InternalName", "Rufus"
             VALUE "LegalCopyright", "© 2011-2015 Pete Batard (GPL v3)"
             VALUE "LegalTrademarks", "http://www.gnu.org/copyleft/gpl.html"
             VALUE "OriginalFilename", "rufus.exe"
             VALUE "ProductName", "Rufus"
-            VALUE "ProductVersion", "2.2.668"
+            VALUE "ProductVersion", "2.2.669"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/src/syslinux.c b/src/syslinux.c
index f867cdb6..d76d1bf8 100644
--- a/src/syslinux.c
+++ b/src/syslinux.c
@@ -43,6 +43,13 @@ DWORD syslinux_ldlinux_len[2];
 unsigned char* syslinux_mboot = NULL;
 DWORD syslinux_mboot_len;
 
+// Workaround for 4K support
+uint32_t SECTOR_SHIFT = 9;
+uint32_t SECTOR_SIZE = 512;
+uint32_t LIBFAT_SECTOR_SHIFT = 9;
+uint32_t LIBFAT_SECTOR_SIZE = 512;
+uint32_t LIBFAT_SECTOR_MASK = 511;
+
 /*
  * Wrapper for ReadFile suitable for libfat
  */
@@ -82,7 +89,7 @@ BOOL InstallSyslinux(DWORD drive_index, char drive_letter, int fs_type)
 	FILE* fd;
 	size_t length;
 
-	static unsigned char sectbuf[SECTOR_SIZE];
+	static unsigned char* sectbuf = NULL;
 	static char* resource[2][2] = {
 		{ MAKEINTRESOURCEA(IDR_SL_LDLINUX_V4_SYS), MAKEINTRESOURCEA(IDR_SL_LDLINUX_V4_BSS) },
 		{ MAKEINTRESOURCEA(IDR_SL_LDLINUX_V6_SYS), MAKEINTRESOURCEA(IDR_SL_LDLINUX_V6_BSS) } };
@@ -102,6 +109,20 @@ BOOL InstallSyslinux(DWORD drive_index, char drive_letter, int fs_type)
 
 	PrintInfoDebug(0, MSG_234, (dt == DT_ISO)?iso_report.sl_version_str:embedded_sl_version_str[use_v5?1:0]);
 
+	// 4K sector size workaround
+	SECTOR_SHIFT = 0;
+	SECTOR_SIZE = SelectedDrive.Geometry.BytesPerSector;
+	while (SECTOR_SIZE>>=1)
+		SECTOR_SHIFT++;
+	SECTOR_SIZE = SelectedDrive.Geometry.BytesPerSector;
+	LIBFAT_SECTOR_SHIFT = SECTOR_SHIFT;
+	LIBFAT_SECTOR_SIZE = SECTOR_SIZE;
+	LIBFAT_SECTOR_MASK = SECTOR_SIZE - 1;
+
+	sectbuf = malloc(SECTOR_SIZE);
+	if (sectbuf == NULL)
+		goto out;
+	
 	/* Initialize the ADV -- this should be smarter */
 	syslinux_reset_adv(syslinux_adv);
 
@@ -335,6 +356,7 @@ BOOL InstallSyslinux(DWORD drive_index, char drive_letter, int fs_type)
 	r = TRUE;
 
 out:
+	safe_free(sectbuf);
 	safe_free(syslinux_ldlinux[0]);
 	safe_free(syslinux_ldlinux[1]);
 	safe_free(sectors);
diff --git a/src/syslinux/libfat/cache.c b/src/syslinux/libfat/cache.c
index 85b7eadf..68c90d57 100644
--- a/src/syslinux/libfat/cache.c
+++ b/src/syslinux/libfat/cache.c
@@ -29,10 +29,10 @@ void *libfat_get_sector(struct libfat_filesystem *fs, libfat_sector_t n)
     }
 
     /* Not found in cache */
-    ls = malloc(sizeof(struct libfat_sector));
+    ls = malloc(sizeof(struct libfat_sector) + LIBFAT_SECTOR_SIZE);
     if (!ls) {
 	libfat_flush(fs);
-	ls = malloc(sizeof(struct libfat_sector));
+	ls = malloc(sizeof(struct libfat_sector) + LIBFAT_SECTOR_SIZE);
 
 	if (!ls)
 	    return NULL;	/* Can't allocate memory */
diff --git a/src/syslinux/libfat/libfat.h b/src/syslinux/libfat/libfat.h
index a0179d7c..60b3654b 100644
--- a/src/syslinux/libfat/libfat.h
+++ b/src/syslinux/libfat/libfat.h
@@ -22,9 +22,14 @@
 #include <stddef.h>
 #include <inttypes.h>
 
-#define LIBFAT_SECTOR_SHIFT	9
-#define LIBFAT_SECTOR_SIZE	512
-#define LIBFAT_SECTOR_MASK	511
+// Workaround for 4K support
+extern uint32_t LIBFAT_SECTOR_SHIFT;
+extern uint32_t LIBFAT_SECTOR_SIZE;
+extern uint32_t LIBFAT_SECTOR_MASK;
+#define MAX_LIBFAT_SECTOR_SIZE	4096
+//#define LIBFAT_SECTOR_SHIFT	9
+//#define LIBFAT_SECTOR_SIZE	512
+//#define LIBFAT_SECTOR_MASK	511
 
 typedef uint64_t libfat_sector_t;
 struct libfat_filesystem;
diff --git a/src/syslinux/libfat/libfatint.h b/src/syslinux/libfat/libfatint.h
index adfad00b..36f4e02e 100644
--- a/src/syslinux/libfat/libfatint.h
+++ b/src/syslinux/libfat/libfatint.h
@@ -25,7 +25,7 @@
 struct libfat_sector {
     libfat_sector_t n;		/* Sector number */
     struct libfat_sector *next;	/* Next in list */
-    char data[LIBFAT_SECTOR_SIZE];
+    char data[0];
 };
 
 enum fat_type {
diff --git a/src/syslinux/libfat/searchdir.c b/src/syslinux/libfat/searchdir.c
index 4964120b..7e47fe58 100644
--- a/src/syslinux/libfat/searchdir.c
+++ b/src/syslinux/libfat/searchdir.c
@@ -25,7 +25,7 @@ int32_t libfat_searchdir(struct libfat_filesystem *fs, int32_t dirclust,
 			 const void *name, struct libfat_direntry *direntry)
 {
     struct fat_dirent *dep;
-    int nent;
+    unsigned int nent;
     libfat_sector_t s = libfat_clustertosector(fs, dirclust);
 
     while (1) {
diff --git a/src/syslinux/libinstaller/syslinux.h b/src/syslinux/libinstaller/syslinux.h
index 8907321c..1f6fe278 100644
--- a/src/syslinux/libinstaller/syslinux.h
+++ b/src/syslinux/libinstaller/syslinux.h
@@ -41,8 +41,11 @@ extern const unsigned int syslinux_mbr_len;
 extern const int syslinux_mbr_mtime;
 
 /* Sector size assumptions... */
-#define SECTOR_SHIFT	9
-#define SECTOR_SIZE	(1 << SECTOR_SHIFT)
+// Workaround for 4K support
+extern uint32_t SECTOR_SHIFT;
+extern uint32_t SECTOR_SIZE;
+//#define SECTOR_SHIFT	9
+//#define SECTOR_SIZE	(1 << SECTOR_SHIFT)
 
 /* This takes a boot sector and merges in the syslinux fields */
 void syslinux_make_bootsect(void *bs, int fs_type);