diff --git a/INSTALL/EFI/BOOT/grubx64.efi b/INSTALL/EFI/BOOT/grubx64.efi
deleted file mode 100644
index 12145cb5..00000000
Binary files a/INSTALL/EFI/BOOT/grubx64.efi and /dev/null differ
diff --git a/INSTALL/Ventoy2Disk.exe b/INSTALL/Ventoy2Disk.exe
index a002bbfb..bce9fe7f 100644
Binary files a/INSTALL/Ventoy2Disk.exe and b/INSTALL/Ventoy2Disk.exe differ
diff --git a/INSTALL/Ventoy2Disk_ARM.exe b/INSTALL/Ventoy2Disk_ARM.exe
index 1ef1862d..b8930d77 100644
Binary files a/INSTALL/Ventoy2Disk_ARM.exe and b/INSTALL/Ventoy2Disk_ARM.exe differ
diff --git a/INSTALL/Ventoy2Disk_ARM64.exe b/INSTALL/Ventoy2Disk_ARM64.exe
index d44835b7..96a5790b 100644
Binary files a/INSTALL/Ventoy2Disk_ARM64.exe and b/INSTALL/Ventoy2Disk_ARM64.exe differ
diff --git a/INSTALL/Ventoy2Disk_X64.exe b/INSTALL/Ventoy2Disk_X64.exe
index ac4c533d..04610f01 100644
Binary files a/INSTALL/Ventoy2Disk_X64.exe and b/INSTALL/Ventoy2Disk_X64.exe differ
diff --git a/INSTALL/grub/grub.cfg b/INSTALL/grub/grub.cfg
index 10260146..5f8ae6cd 100644
--- a/INSTALL/grub/grub.cfg
+++ b/INSTALL/grub/grub.cfg
@@ -2397,7 +2397,7 @@ function mimg_common_menuentry {
 #############################################################
 #############################################################
 
-set VENTOY_VERSION="1.0.84"
+set VENTOY_VERSION="1.0.85"
 
 #ACPI not compatible with Window7/8, so disable by default
 set VTOY_PARAM_NO_ACPI=1
diff --git a/Ventoy2Disk/Ventoy2Disk/PhyDrive.c b/Ventoy2Disk/Ventoy2Disk/PhyDrive.c
index 11e3d966..af68bec3 100644
--- a/Ventoy2Disk/Ventoy2Disk/PhyDrive.c
+++ b/Ventoy2Disk/Ventoy2Disk/PhyDrive.c
@@ -1750,6 +1750,7 @@ int InstallVentoy2PhyDrive(PHY_DRIVE_INFO *pPhyDrive, int PartStyle, int TryId)
     UINT64 Part1SectorCount = 0;
     UINT64 Part2StartSector = 0;
     BOOL LargeFAT32 = FALSE;
+    BOOL DefaultExFAT = FALSE;
 
 	Log("#####################################################");
     Log("InstallVentoy2PhyDrive try%d %s PhyDrive%d <<%s %s %dGB>>", TryId,
@@ -1862,6 +1863,17 @@ int InstallVentoy2PhyDrive(PHY_DRIVE_INFO *pPhyDrive, int PartStyle, int TryId)
             goto End;
         }
     }
+    else if (GetVentoyFsType() == VTOY_FS_EXFAT && GetClusterSize() == 0)
+    {
+        Log("Formatting part1 exFAT ...");
+        DefaultExFAT = TRUE;
+        if (0 != FormatPart1exFAT(pPhyDrive->SizeInBytes))
+        {
+            Log("FormatPart1exFAT failed.");
+            rc = 1;
+            goto End;
+        }
+    }
     else
     {
         Log("Zero part1 file system ...");
@@ -2008,6 +2020,11 @@ End:
                 Log("No need to reformat for large FAT32");
                 pPhyDrive->VentoyFsClusterSize = GetVolumeClusterSize(MountDrive);
             }
+            else if (DefaultExFAT)
+            {
+                Log("No need to reformat for default exfat");
+                pPhyDrive->VentoyFsClusterSize = GetVolumeClusterSize(MountDrive);
+            }
             else
             {
                 bRet = DISK_FormatVolume(MountDrive, GetVentoyFsType(), Part1SectorCount * 512);