diff --git a/res/mbr/mbr.S b/res/mbr/mbr.S
index dedf7ddc..746eb2b2 100644
--- a/res/mbr/mbr.S
+++ b/res/mbr/mbr.S
@@ -134,7 +134,7 @@ check_timeout:
 	cmpb ds:counter_timeout, 0x00
 	jnz  wait_for_keyboard
 
-boot_fixed_disk:		# Timeout occured => boot second bootable disk (non USB)
+boot_fixed_disk:		# Timeout occurred => boot second bootable disk (non USB)
 	call restore_rtc_vect	# Remove our RTC override
 	movb ds:partition_table, 0x81	# target we want to swap with 0x80
 	push 0x0080
diff --git a/src/dos.c b/src/dos.c
index 119d6671..84a9280a 100644
--- a/src/dos.c
+++ b/src/dos.c
@@ -154,7 +154,7 @@ static void FatDateTimeToSystemTime(PLARGE_INTEGER SystemTime, PFAT_DATETIME Fat
 	/* Fix seconds value that might get beyond the bound */
 	if (TimeFields.Second > 59) TimeFields.Second = 0;
 
-	/* Perform ceonversion to system time if possible */
+	/* Perform conversion to system time if possible */
 	if (!RtlTimeFieldsToTime(&TimeFields, SystemTime)) {
 		/* Set to default time if conversion failed */
 		SystemTime->QuadPart = 0;
@@ -280,7 +280,7 @@ static BOOL ExtractFAT(int entry, const char* path)
 	}
 
 	safe_closehandle(hFile);
-	uprintf("Succesfully wrote '%s' (%d bytes)\n", filename, filesize);
+	uprintf("Successfully wrote '%s' (%d bytes)\n", filename, filesize);
 
 	return TRUE;
 }
@@ -396,7 +396,7 @@ BOOL ExtractFreeDOS(const char* path)
 		// thus we would need to have a separate header with each file's timestamps
 
 		safe_closehandle(hFile);
-		uprintf("Succesfully wrote '%s' (%d bytes)\n", filename, res_size);
+		uprintf("Successfully wrote '%s' (%d bytes)\n", filename, res_size);
 
 		if ((i == 4) || (i == 10) || (i == 16) || (i == 22) || (i == ARRAYSIZE(res_name)-1))
 			UpdateProgress(OP_DOS, -1.0f);
diff --git a/src/dos_locale.c b/src/dos_locale.c
index b042b10b..c131ffd2 100644
--- a/src/dos_locale.c
+++ b/src/dos_locale.c
@@ -639,7 +639,7 @@ static const char* get_kb(void)
 		case 0x00000440: // Kyrgyz Cyrillic
 			return "ky";
 		case 0x00000043:
-		case 0x00000843: // Uzbek Crillic
+		case 0x00000843: // Uzbek Cyrillic
 			return "uz";
 		case 0x00000042:
 		case 0x00000442: // Turkmen
@@ -970,7 +970,7 @@ BOOL SetDOSLocale(const char* path, BOOL bFreeDOS)
 		fprintf(fd, "set PATH=.;\\;\\LOCALE\n");
 		fprintf(fd, "echo Using %s keyboard with %s codepage [%d]\n", kb_to_hr("us"), cp_to_hr(437), 437);
 		fclose(fd);
-		uprintf("Succesfully wrote 'AUTOEXEC.BAT'\n");
+		uprintf("Successfully wrote 'AUTOEXEC.BAT'\n");
 		return TRUE;
 	}
 
@@ -997,7 +997,7 @@ BOOL SetDOSLocale(const char* path, BOOL bFreeDOS)
 		bFreeDOS?"MENU ":"MENUITEM=", bFreeDOS?')':',', kb_to_hr("us"), cp_to_hr(437), 437);
 	fprintf(fd, "%s", bFreeDOS?"MENU\n12?\n":"[1]\ndevice=\\locale\\display.sys con=(ega,,1)\n[2]\n");
 	fclose(fd);
-	uprintf("Succesfully wrote 'CONFIG.SYS'\n");
+	uprintf("Successfully wrote 'CONFIG.SYS'\n");
 
 	// AUTOEXEC.BAT
 	strcpy(filename, path);
@@ -1018,7 +1018,7 @@ BOOL SetDOSLocale(const char* path, BOOL bFreeDOS)
 	fprintf(fd, "keyb %s,,\\locale\\%s\n", kb, kbdrv);
 	fprintf(fd, ":2\n");
 	fclose(fd);
-	uprintf("Succesfully wrote 'AUTOEXEC.BAT'\n");
+	uprintf("Successfully wrote 'AUTOEXEC.BAT'\n");
 
 	return TRUE;
 }
diff --git a/src/format.c b/src/format.c
index 0e407c51..f1f6eb31 100644
--- a/src/format.c
+++ b/src/format.c
@@ -243,7 +243,7 @@ static void ToValidLabel(WCHAR* name, BOOL bFAT)
 			if (name[i] == '_') j++;
 		if (i<2*j) {
 			// If the final label is mostly underscore, use the proposed label
-			uprintf("FAT label is mostly undercores. Using '%s' label instead.\n", SelectedDrive.proposed_label);
+			uprintf("FAT label is mostly underscores. Using '%s' label instead.\n", SelectedDrive.proposed_label);
 			for(i=0; SelectedDrive.proposed_label[i]!=0; i++)
 				name[i] = SelectedDrive.proposed_label[i];
 			name[i] = 0;
@@ -265,7 +265,7 @@ static void ToValidLabel(WCHAR* name, BOOL bFAT)
  * 
  * Low order word is calculated:               Volume Serial Number is:
  * Month & Day         12/26   0c1ah
- * Sec & Hundrenths    41:94   295eh               3578:1d02
+ * Sec & Hundredths    41:94   295eh               3578:1d02
  * -----
  * 3578h
  * 
@@ -387,7 +387,7 @@ static BOOL FormatFAT32(DWORD DriveIndex)
 	if (IS_ERROR(FormatStatus)) goto out;
 	if (!DeviceIoControl (hLogicalVolume, IOCTL_DISK_GET_PARTITION_INFO, NULL, 0, &piDrive,
 		sizeof(piDrive), &cbRet, NULL)) {
-		die("Failed to get parition info\n", ERROR_NOT_SUPPORTED);
+		die("Failed to get partition info\n", ERROR_NOT_SUPPORTED);
 	}
 
 	BytesPerSect = dgDrive.BytesPerSector;
@@ -493,7 +493,7 @@ static BOOL FormatFAT32(DWORD DriveIndex)
 	// Sector 6 Backup boot sector
 	// Sector 7 Backup FSInfo sector
 	// Sector 8 Backup 'more boot code'
-	// zero'd sectors upto ReservedSectCount
+	// zeroed sectors upto ReservedSectCount
 	// FAT1  ReservedSectCount to ReservedSectCount + FatSize
 	// ...
 	// FATn  ReservedSectCount to ReservedSectCount + FatSize
@@ -525,7 +525,7 @@ static BOOL FormatFAT32(DWORD DriveIndex)
 		die("This drive is too big for large FAT32 format\n", APPERR(ERROR_INVALID_VOLUME_SIZE));
 	}
 
-	// Now we're commited - print some info first
+	// Now we're committed - print some info first
 	uprintf("Size : %s %u sectors\n", SizeToHumanReadable(piDrive.PartitionLength), TotalSectors);
 	uprintf("Cluster size %d bytes, %d Bytes Per Sector\n", SectorsPerCluster*BytesPerSect, BytesPerSect);
 	uprintf("Volume ID is %x:%x\n", VolumeId>>16, VolumeId&0xffff);
@@ -534,7 +534,7 @@ static BOOL FormatFAT32(DWORD DriveIndex)
 
 	// Fix up the FSInfo sector
 	pFAT32FsInfo->dFree_Count = (UserAreaSize/SectorsPerCluster) - 1;
-	pFAT32FsInfo->dNxt_Free = 3; // clusters 0-1 resered, we used cluster 2 for the root dir
+	pFAT32FsInfo->dNxt_Free = 3; // clusters 0-1 reserved, we used cluster 2 for the root dir
 
 	uprintf("%d Free Clusters\n", pFAT32FsInfo->dFree_Count);
 	// Work out the Cluster count
@@ -560,7 +560,7 @@ static BOOL FormatFAT32(DWORD DriveIndex)
 		}
 	}
 
-	uprintf ("Initialising reserved sectors and FATs...\n");
+	uprintf ("Initializing reserved sectors and FATs...\n");
 	// Now we should write the boot sector and fsinfo twice, once at 0 and once at the backup boot sect position
 	for (i=0; i<2; i++) {
 		int SectorStart = (i==0) ? 0 : BackupBootSect;
@@ -994,7 +994,7 @@ static BOOL SetupWinPE(char drive_letter)
 			uprintf("Failed to add SetupSourceDevice in %s\n", dst);
 			goto out;
 		}
-		uprintf("Succesfully added '%s' to %s\n", setupsrcdev, dst);
+		uprintf("Successfully added '%s' to %s\n", setupsrcdev, dst);
 	}
 
 	safe_sprintf(src, sizeof(src), "%c:\\%s\\setupldr.bin", drive_letter,  basedir[index]);
@@ -1104,7 +1104,7 @@ static BOOL RemountVolume(char drive_letter)
 				uprintf("Successfully remounted %s on %s\n", &drive_guid[4], drive_name);
 			} else {
 				uprintf("Failed to remount %s on %s\n", &drive_guid[4], drive_name);
-				// This will leave the drive unaccessible and must be flagged as an error
+				// This will leave the drive inaccessible and must be flagged as an error
 				FormatStatus = ERROR_SEVERITY_ERROR|FAC(FACILITY_STORAGE)|APPERR(ERROR_CANT_REMOUNT_VOLUME);
 				return FALSE;
 			}
diff --git a/src/msvc-missing/stdint.h b/src/msvc-missing/stdint.h
index 51687f70..1914e6d9 100644
--- a/src/msvc-missing/stdint.h
+++ b/src/msvc-missing/stdint.h
@@ -228,7 +228,7 @@ typedef unsigned __int64   uintmax_t;
 
 /* 7.18.4.1  Macros for minimum-width integer constants
 
-    Accoding to Douglas Gwyn <gwyn@arl.mil>:
+    According to Douglas Gwyn <gwyn@arl.mil>:
 	"This spec was changed in ISO/IEC 9899:1999 TC1; in ISO/IEC
 	9899:1999 as initially published, the expansion was required
 	to be an integer constant of precisely matching type, which
diff --git a/src/net.c b/src/net.c
index e27c6b6f..15f10f25 100644
--- a/src/net.c
+++ b/src/net.c
@@ -314,7 +314,7 @@ BOOL DownloadFile(const char* url, const char* file, HWND hProgressDialog)
 	HttpQueryInfoA(hRequest, HTTP_QUERY_STATUS_CODE|HTTP_QUERY_FLAG_NUMBER, (LPVOID)&dwStatus, &dwSize, NULL);
 	if (dwStatus != 200) {
 		error_code = ERROR_INTERNET_ITEM_NOT_FOUND;
-		uprintf("Unable to acess file: Server status %d\n", dwStatus);
+		uprintf("Unable to access file: Server status %d\n", dwStatus);
 		goto out;
 	}
 	dwSize = sizeof(dwTotalSize);
diff --git a/src/parser.c b/src/parser.c
index d5e778e5..c7e8c320 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -90,7 +90,7 @@ static wchar_t* get_token_data_line(const wchar_t* wtoken, wchar_t* wline)
 	return (wline[r] == 0)?NULL:&wline[r];
 }
 
-// Parse a file (ANSI or UTF-8 or UTF-16) and return the data for the first occurence of 'token'
+// Parse a file (ANSI or UTF-8 or UTF-16) and return the data for the first occurrence of 'token'
 // The returned string is UTF-8 and MUST be freed by the caller
 char* get_token_data_file(const char* token, const char* filename)
 {
@@ -135,7 +135,7 @@ out:
 	return ret;
 }
 
-// Parse a buffer (ANSI or UTF-8) and return the data for the 'n'th occurence of 'token'
+// Parse a buffer (ANSI or UTF-8) and return the data for the 'n'th occurrence of 'token'
 // The returned string is UTF-8 and MUST be freed by the caller
 char* get_token_data_buffer(const char* token, unsigned int n, const char* buffer, size_t buffer_size)
 {
@@ -345,7 +345,7 @@ out:
 	if (fd_in != NULL) fclose(fd_in);
 	if (fd_out != NULL) fclose(fd_out);
 
-	// If an insertion occured, delete existing file and use the new one
+	// If an insertion occurred, delete existing file and use the new one
 	if (ret != NULL) {
 		// We're in Windows text mode => Remove CRs if requested
 		fd_in = _wfopen(wtmpname, L"rb");
@@ -375,10 +375,10 @@ out:
 	return ret;
 }
 
-// Search for a specific 'src' substring data for all occurences of 'token', and replace
+// Search for a specific 'src' substring data for all occurrences of 'token', and replace
 // it with 'rep'. File can be ANSI or UNICODE and is overwritten. Parameters are UTF-8.
 // The parsed line is of the form: [ ]token[ ]data
-// Returns a pointer to rep if replacement occured, NULL otherwise
+// Returns a pointer to rep if replacement occurred, NULL otherwise
 char* replace_in_token_data(const char* filename, const char* token, const char* src, const char* rep, BOOL dos2unix)
 {
 	const wchar_t* outmode[] = { L"w", L"w, ccs=UTF-8", L"w, ccs=UTF-16LE" };
@@ -491,7 +491,7 @@ out:
 	if (fd_in != NULL) fclose(fd_in);
 	if (fd_out != NULL) fclose(fd_out);
 
-	// If a replacement occured, delete existing file and use the new one
+	// If a replacement occurred, delete existing file and use the new one
 	if (ret != NULL) {
 		// We're in Windows text mode => Remove CRs if requested
 		fd_in = _wfopen(wtmpname, L"rb");
diff --git a/src/rufus.c b/src/rufus.c
index e8b6ecb7..da464996 100644
--- a/src/rufus.c
+++ b/src/rufus.c
@@ -130,7 +130,7 @@ static int64_t last_iso_blocking_status;
 /*
  * The following is used to allocate slots within the progress bar
  * 0 means unused (no operation or no progress allocated to it)
- * +n means allocate exactly n bars (n percents of the progress bar)
+ * +n means allocate exactly n bars (n percent of the progress bar)
  * -n means allocate a weighted slot of n from all remaining
  *    bars. Eg if 80 slots remain and the sum of all negative entries
  *    is 10, -4 will allocate 4/10*80 = 32 bars (32%) for OP progress
@@ -207,7 +207,7 @@ static BOOL DefineClusterSizes(void)
 	}
 
 	// FAT 32
-	// > 32GB FAT32 is not supported by MS and FormatEx but is achieved using fat32fomat
+	// > 32GB FAT32 is not supported by MS and FormatEx but is achieved using fat32format
 	// See: http://www.ridgecrop.demon.co.uk/index.htm?fat32format.htm
 	// < 32 MB FAT32 is not allowed by FormatEx, so we don't bother
 
@@ -984,7 +984,7 @@ BOOL CALLBACK ISOProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
 		UpdateWindow(hDlg);
 		return TRUE;
 	case UM_ISO_EXIT:
-		// Just hide and recentrer the dialog
+		// Just hide and recenter the dialog
 		ShowWindow(hDlg, SW_HIDE);
 		iso_op_in_progress = FALSE;
 		return TRUE;
@@ -1804,7 +1804,7 @@ static INT_PTR CALLBACK MainCallback(HWND hDlg, UINT message, WPARAM wParam, LPA
 		uprintf("\r\n");
 		GetUSBDevices(DeviceNum);
 		if (!IS_ERROR(FormatStatus)) {
-			// This is the only way to achieve instantenous progress transition to 100%
+			// This is the only way to achieve instantanenous progress transition to 100%
 			SendMessage(hProgress, PBM_SETRANGE, 0, ((MAX_PROGRESS+1)<<16) & 0xFFFF0000);
 			SendMessage(hProgress, PBM_SETPOS, (MAX_PROGRESS+1), 0);
 			SendMessage(hProgress, PBM_SETRANGE, 0, (MAX_PROGRESS<<16) & 0xFFFF0000);
diff --git a/src/rufus.rc b/src/rufus.rc
index 7a7cdbdb..0a6ca5d0 100644
--- a/src/rufus.rc
+++ b/src/rufus.rc
@@ -30,7 +30,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
 IDD_DIALOG DIALOGEX 12, 12, 206, 329
 STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_APPWINDOW
-CAPTION "Rufus v1.3.4.256"
+CAPTION "Rufus v1.3.4.257"
 FONT 8, "MS Shell Dlg", 400, 0, 0x1
 BEGIN
     DEFPUSHBUTTON   "Start",IDC_START,94,291,50,14
@@ -63,7 +63,7 @@ BEGIN
     COMBOBOX        IDC_DISK_ID,119,246,73,30,CBS_DROPDOWNLIST | NOT WS_VISIBLE | WS_VSCROLL | WS_TABSTOP
     CONTROL         "Add fixes for old BIOSes (extra partition, align, etc.)",IDC_EXTRA_PARTITION,
                     "Button",BS_AUTOCHECKBOX | WS_TABSTOP,13,235,184,10
-    CONTROL         "List fixed (non-flash) or unpartitionned USB disks",IDC_ENABLE_FIXED_DISKS,
+    CONTROL         "List fixed (non-flash) or unpartitioned USB disks",IDC_ENABLE_FIXED_DISKS,
                     "Button",BS_AUTOCHECKBOX | WS_TABSTOP,13,222,185,10
     PUSHBUTTON      "Log",IDC_LOG,62,291,18,14
 END
@@ -278,8 +278,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 1,3,4,256
- PRODUCTVERSION 1,3,4,256
+ FILEVERSION 1,3,4,257
+ PRODUCTVERSION 1,3,4,257
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -296,13 +296,13 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "Akeo Consulting (http://akeo.ie)"
             VALUE "FileDescription", "Rufus"
-            VALUE "FileVersion", "1.3.4.256"
+            VALUE "FileVersion", "1.3.4.257"
             VALUE "InternalName", "Rufus"
             VALUE "LegalCopyright", "© 2011-2013 Pete Batard (GPL v3)"
             VALUE "LegalTrademarks", "http://www.gnu.org/copyleft/gpl.html"
             VALUE "OriginalFilename", "rufus.exe"
             VALUE "ProductName", "Rufus"
-            VALUE "ProductVersion", "1.3.4.256"
+            VALUE "ProductVersion", "1.3.4.257"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/src/sys_types.h b/src/sys_types.h
index e99b0172..5fc37ff7 100644
--- a/src/sys_types.h
+++ b/src/sys_types.h
@@ -94,7 +94,7 @@ SysType msdos_systypes[] = {
 	{ 0x88, N_("Linux Plaintext") },
 	{ 0x8e, N_("Linux LVM") },
 	{ 0x93, N_("Amoeba") },
-	/*This guys created a seperate partition for badblocks?! */
+	/*This guys created a separate partition for badblocks?! */
 	{ 0x94, N_("Amoeba BBT") },
 	{ 0x9f, N_("BSD/OS") },
 	{ 0xa0, N_("Thinkpad Hibernation") },
diff --git a/src/syslinux.c b/src/syslinux.c
index 3f1c2a30..0b621b75 100644
--- a/src/syslinux.c
+++ b/src/syslinux.c
@@ -133,7 +133,7 @@ BOOL InstallSyslinux(DWORD drive_index, char drive_letter)
 		goto out;
 	}
 
-	uprintf("Succesfully wrote '%s'\n", ldlinux_sys);
+	uprintf("Successfully wrote '%s'\n", ldlinux_sys);
 	if (dt != DT_ISO)
 		UpdateProgress(OP_DOS, -1.0f);
 
@@ -203,7 +203,7 @@ BOOL InstallSyslinux(DWORD drive_index, char drive_letter)
 		goto out;
 	}
 
-	uprintf("Succesfully wrote Syslinux boot record\n");
+	uprintf("Successfully wrote Syslinux boot record\n");
 
 	if (dt == DT_SYSLINUX_V5) {
 		fd = fopen(ldlinux_c32, "rb");
diff --git a/src/syslinux/libinstaller/setadv.c b/src/syslinux/libinstaller/setadv.c
index 838678bd..66601f7c 100644
--- a/src/syslinux/libinstaller/setadv.c
+++ b/src/syslinux/libinstaller/setadv.c
@@ -14,7 +14,7 @@
 /*
  * setadv.c
  *
- * (Over)write a data item in the auxilliary data vector.  To
+ * (Over)write a data item in the auxiliary data vector.  To
  * delete an item, set its length to zero.
  *
  * Return 0 on success, -1 on error, and set errno.