diff --git a/res/loc/ChangeLog.txt b/res/loc/ChangeLog.txt
index 13881ac5..d7516e8b 100644
--- a/res/loc/ChangeLog.txt
+++ b/res/loc/ChangeLog.txt
@@ -23,6 +23,7 @@ o v3.*
   - *NEW*      MSG_317 "Disk ID"
   // The following can be tested with <Alt>-<+> and <Alt>-<->
   - *NEW*      MSG_318 "Default thread priority: %d"
+  - *NEW*      MSG_319 "Ignore Boot Marker"
 
 o v3.5 (2019.03.12)
   The following 3 messages can be tested by creating a UEFI:NTFS drive in Rufus ('Show advanced drive properties' must be enabled
diff --git a/res/loc/rufus.loc b/res/loc/rufus.loc
index 57218f53..bfb85246 100644
--- a/res/loc/rufus.loc
+++ b/res/loc/rufus.loc
@@ -578,6 +578,7 @@ t MSG_315 "Multiple buttons"
 t MSG_316 "Number of passes"
 t MSG_317 "Disk ID"
 t MSG_318 "Default thread priority: %d"
+t MSG_319 "Ignore Boot Marker"
 
 #########################################################################
 l "ar-SA" "Arabic (العربية)" 0x0401, 0x0801, 0x0c01, 0x1001, 0x1401, 0x1801, 0x1c01, 0x2001, 0x2401, 0x2801, 0x2c01, 0x3001, 0x3401, 0x3801, 0x3c01, 0x4001
diff --git a/src/drive.c b/src/drive.c
index 6b324cd6..39b6380c 100644
--- a/src/drive.c
+++ b/src/drive.c
@@ -1293,7 +1293,6 @@ const struct {int (*fn)(FILE *fp); char* str;} known_mbr[] = {
 // Returns TRUE if the drive seems bootable, FALSE otherwise
 BOOL AnalyzeMBR(HANDLE hPhysicalDrive, const char* TargetName, BOOL bSilent)
 {
-	const char* mbr_name = "Master Boot Record";
 	FAKE_FD fake_fd = { 0 };
 	FILE* fp = (FILE*)&fake_fd;
 	int i;
@@ -1302,17 +1301,17 @@ BOOL AnalyzeMBR(HANDLE hPhysicalDrive, const char* TargetName, BOOL bSilent)
 	set_bytes_per_sector(SelectedDrive.SectorSize);
 
 	if (!is_br(fp)) {
-		suprintf("%s does not have an x86 %s", TargetName, mbr_name);
+		suprintf("%s does not have a Boot Marker", TargetName);
 		return FALSE;
 	}
 	for (i=0; i<ARRAYSIZE(known_mbr); i++) {
 		if (known_mbr[i].fn(fp)) {
-			suprintf("%s has a %s %s", TargetName, known_mbr[i].str, mbr_name);
+			suprintf("%s has a %s Master Boot Record", TargetName, known_mbr[i].str);
 			return TRUE;
 		}
 	}
 
-	suprintf("%s has an unknown %s", TargetName, mbr_name);
+	suprintf("%s has an unknown Master Boot Record", TargetName);
 	return TRUE;
 }
 
diff --git a/src/rufus.c b/src/rufus.c
index a269fb0a..4d4cd755 100755
--- a/src/rufus.c
+++ b/src/rufus.c
@@ -119,7 +119,7 @@ BOOL enable_HDDs = FALSE, enable_VHDs = TRUE, enable_ntfs_compression = FALSE, n
 BOOL advanced_mode_device, advanced_mode_format, allow_dual_uefi_bios, detect_fakes, enable_vmdk, force_large_fat32, usb_debug;
 BOOL use_fake_units, preserve_timestamps = FALSE, fast_zeroing = FALSE, app_changed_size = FALSE;
 BOOL zero_drive = FALSE, list_non_usb_removable_drives = FALSE, enable_file_indexing, large_drive = FALSE;
-BOOL write_as_image = FALSE, write_as_esp = FALSE, installed_uefi_ntfs = FALSE, use_vds = FALSE;
+BOOL write_as_image = FALSE, write_as_esp = FALSE, installed_uefi_ntfs = FALSE, use_vds = FALSE, ignore_boot_marker = FALSE;
 BOOL windows_to_go_selected = FALSE;
 float fScale = 1.0f;
 int dialog_showing = 0, selection_default = BT_IMAGE, persistence_unit_selection = -1;
@@ -1209,7 +1209,7 @@ DWORD WINAPI ImageScanThread(LPVOID param)
 	EnableControls(FALSE, FALSE);
 	memset(&img_report, 0, sizeof(img_report));
 	img_report.is_iso = (BOOLEAN)ExtractISO(image_path, "", TRUE);
-	img_report.is_bootable_img = (BOOLEAN)IsBootableImage(image_path);
+	img_report.is_bootable_img = IsBootableImage(image_path);
 	ComboBox_ResetContent(hImageOption);
 
 	if ((FormatStatus == (ERROR_SEVERITY_ERROR | FAC(FACILITY_STORAGE) | ERROR_CANCELLED)) ||
@@ -1224,6 +1224,7 @@ DWORD WINAPI ImageScanThread(LPVOID param)
 		PrintInfoDebug(0, MSG_203);
 		PrintStatus(0, MSG_203);
 		EnableControls(TRUE, FALSE);
+		MessageBoxExU(hMainDialog, lmprintf(MSG_082), lmprintf(MSG_081), MB_OK | MB_ICONINFORMATION | MB_IS_RTL, selected_langid);
 		goto out;
 	}
 
@@ -1247,8 +1248,11 @@ DWORD WINAPI ImageScanThread(LPVOID param)
 		}
 		uprintf("  Image is %sa UEFI bootable Windows installation image", img_report.has_efi ? "" : "NOT ");
 	} else if (img_report.is_bootable_img) {
-		uprintf("  Image is a %sbootable %s image",
-			(img_report.compression_type != BLED_COMPRESSION_NONE) ? "compressed " : "", img_report.is_vhd ? "VHD" : "disk");
+		if (img_report.is_bootable_img == 2)
+			uprintf("  Image is a FORCED non-bootable image");
+		else
+			uprintf("  Image is a %sbootable %s image",
+				(img_report.compression_type != BLED_COMPRESSION_NONE) ? "compressed " : "", img_report.is_vhd ? "VHD" : "disk");
 		selection_default = BT_IMAGE;
 	}
 
@@ -3295,6 +3299,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	enable_file_indexing = ReadSettingBool(SETTING_ENABLE_FILE_INDEXING);
 	enable_VHDs = !ReadSettingBool(SETTING_DISABLE_VHDS);
 	enable_extra_hashes = ReadSettingBool(SETTING_ENABLE_EXTRA_HASHES);
+	ignore_boot_marker = ReadSettingBool(SETTING_IGNORE_BOOT_MARKER);
 	// We want above normal priority by default, so we offset the value.
 	default_thread_priority = ReadSetting32(SETTING_DEFAULT_THREAD_PRIORITY) + THREAD_PRIORITY_ABOVE_NORMAL;
 
@@ -3464,7 +3469,7 @@ relaunch:
 	while(GetMessage(&msg, NULL, 0, 0)) {
 		static BOOL ctrl_without_focus = FALSE;
 		BOOL no_focus = (msg.message == WM_SYSKEYDOWN) && !(msg.lParam & 0x20000000);
-		// ** *********** ***************
+		// ** ***************************
 		// .,ABCDEFGHIJKLMNOPQRSTUVWXYZ+-
 
 		// Sigh... The things one need to do to detect standalone use of the 'Alt' key.
@@ -3645,6 +3650,14 @@ relaunch:
 				GetDevices(0);
 				continue;
 			}
+			// Alt-M => Toggle the check for the 0x55 0xAA boot marker at offset 0x1fe.
+			// This means that Rufus treats anything selected as a writeable DD image.
+			if ((msg.message == WM_SYSKEYDOWN) && (msg.wParam == 'M')) {
+				ignore_boot_marker = !ignore_boot_marker;
+				WriteSettingBool(SETTING_IGNORE_BOOT_MARKER, ignore_boot_marker);
+				PrintStatusTimeout(lmprintf(MSG_319), ignore_boot_marker);
+				continue;
+			}
 			// Alt N => Enable NTFS compression
 			if ((msg.message == WM_SYSKEYDOWN) && (msg.wParam == 'N')) {
 				enable_ntfs_compression = !enable_ntfs_compression;
diff --git a/src/rufus.h b/src/rufus.h
index 2825eb0f..e53d939b 100644
--- a/src/rufus.h
+++ b/src/rufus.h
@@ -343,7 +343,7 @@ typedef struct {
 	int64_t mismatch_size;
 	uint32_t wininst_version;
 	BOOLEAN is_iso;
-	BOOLEAN is_bootable_img;
+	uint8_t is_bootable_img;
 	BOOLEAN is_vhd;
 	BOOLEAN is_windows_img;
 	BOOLEAN disable_iso;
@@ -567,7 +567,7 @@ extern BOOL WimExtractFile(const char* wim_image, int index, const char* src, co
 extern BOOL WimExtractFile_API(const char* image, int index, const char* src, const char* dst, BOOL bSilent);
 extern BOOL WimExtractFile_7z(const char* image, int index, const char* src, const char* dst, BOOL bSilent);
 extern BOOL WimApplyImage(const char* image, int index, const char* dst);
-extern BOOL IsBootableImage(const char* path);
+extern uint8_t IsBootableImage(const char* path);
 extern BOOL AppendVHDFooter(const char* vhd_path);
 extern int SetWinToGoIndex(void);
 extern int IsHDD(DWORD DriveIndex, uint16_t vid, uint16_t pid, const char* strid);
diff --git a/src/rufus.rc b/src/rufus.rc
index 48764cfe..06783ffa 100644
--- a/src/rufus.rc
+++ b/src/rufus.rc
@@ -33,7 +33,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
 IDD_DIALOG DIALOGEX 12, 12, 232, 326
 STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_ACCEPTFILES
-CAPTION "Rufus 3.13.1723"
+CAPTION "Rufus 3.13.1724"
 FONT 9, "Segoe UI Symbol", 400, 0, 0x0
 BEGIN
     LTEXT           "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP
@@ -395,8 +395,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 3,13,1723,0
- PRODUCTVERSION 3,13,1723,0
+ FILEVERSION 3,13,1724,0
+ PRODUCTVERSION 3,13,1724,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -414,13 +414,13 @@ BEGIN
             VALUE "Comments", "https://rufus.ie"
             VALUE "CompanyName", "Akeo Consulting"
             VALUE "FileDescription", "Rufus"
-            VALUE "FileVersion", "3.13.1723"
+            VALUE "FileVersion", "3.13.1724"
             VALUE "InternalName", "Rufus"
             VALUE "LegalCopyright", "© 2011-2020 Pete Batard (GPL v3)"
             VALUE "LegalTrademarks", "https://www.gnu.org/licenses/gpl-3.0.html"
             VALUE "OriginalFilename", "rufus-3.13.exe"
             VALUE "ProductName", "Rufus"
-            VALUE "ProductVersion", "3.13.1723"
+            VALUE "ProductVersion", "3.13.1724"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/src/settings.h b/src/settings.h
index ade24de8..06a13f0f 100644
--- a/src/settings.h
+++ b/src/settings.h
@@ -42,6 +42,7 @@ extern char* ini_file;
 #define SETTING_ENABLE_VMDK_DETECTION       "EnableVmdkDetection"
 #define SETTING_ENABLE_WIN_DUAL_EFI_BIOS    "EnableWindowsDualUefiBiosMode"
 #define SETTING_FORCE_LARGE_FAT32_FORMAT    "ForceLargeFat32Formatting"
+#define SETTING_IGNORE_BOOT_MARKER          "IgnoreBootMarker"
 #define SETTING_INCLUDE_BETAS               "CheckForBetas"
 #define SETTING_LAST_UPDATE                 "LastUpdateCheck"
 #define SETTING_LOCALE                      "Locale"
diff --git a/src/vhd.c b/src/vhd.c
index 623736da..17d9f968 100644
--- a/src/vhd.c
+++ b/src/vhd.c
@@ -111,6 +111,7 @@ PF_TYPE_DECL(RPC_ENTRY, RPC_STATUS, UuidCreate, (UUID __RPC_FAR*));
 uint32_t wim_nb_files, wim_proc_files, wim_extra_files;
 HANDLE apply_wim_thread = NULL;
 extern int default_thread_priority;
+extern BOOL ignore_boot_marker;
 
 static uint8_t wim_flags = 0;
 static wchar_t wmount_path[MAX_PATH] = { 0 };
@@ -277,7 +278,8 @@ BOOL IsCompressedBootableImage(const char* path)
 	return FALSE;
 }
 
-BOOL IsBootableImage(const char* path)
+// 0: non-bootable, 1: bootable, 2: forced bootable
+uint8_t IsBootableImage(const char* path)
 {
 	HANDLE handle = INVALID_HANDLE_VALUE;
 	LARGE_INTEGER liImageSize;
@@ -287,7 +289,7 @@ BOOL IsBootableImage(const char* path)
 	uint32_t checksum, old_checksum;
 	uint64_t wim_magic = 0;
 	LARGE_INTEGER ptr = { 0 };
-	BOOL is_bootable_img = FALSE;
+	uint8_t is_bootable_img = 0;
 
 	uprintf("Disk image analysis:");
 	handle = CreateFileU(path, GENERIC_READ, FILE_SHARE_READ, NULL,
@@ -297,9 +299,9 @@ BOOL IsBootableImage(const char* path)
 		goto out;
 	}
 
-	is_bootable_img = (BOOLEAN)IsCompressedBootableImage(path);
+	is_bootable_img = IsCompressedBootableImage(path) ? 1 : 0;
 	if (img_report.compression_type == BLED_COMPRESSION_NONE)
-		is_bootable_img = (BOOLEAN)AnalyzeMBR(handle, "  Image", FALSE);
+		is_bootable_img = AnalyzeMBR(handle, "  Image", FALSE) ? 1 : (ignore_boot_marker ? 2 : 0);
 
 	if (!GetFileSizeEx(handle, &liImageSize)) {
 		uprintf("  Could not get image size: %s", WindowsErrorString());
@@ -326,7 +328,7 @@ BOOL IsBootableImage(const char* path)
 			if ( (bswap_uint32(footer->file_format_version) != VHD_FOOTER_FILE_FORMAT_V1_0)
 			  || (bswap_uint32(footer->disk_type) != VHD_FOOTER_TYPE_FIXED_HARD_DISK)) {
 				uprintf("  Unsupported type of VHD image");
-				is_bootable_img = FALSE;
+				is_bootable_img = 0;
 				goto out;
 			}
 			// Might as well validate the checksum while we're at it