diff --git a/reactos/dll/win32/kernel32/client/file/create.c b/reactos/dll/win32/kernel32/client/file/create.c
index 5ee75139e9b..83467895b5b 100644
--- a/reactos/dll/win32/kernel32/client/file/create.c
+++ b/reactos/dll/win32/kernel32/client/file/create.c
@@ -535,11 +535,11 @@ OpenFile(LPCSTR lpFileName,
 	ObjectAttributes.SecurityQualityOfService = NULL;
 
 	errCode = NtOpenFile (&FileHandle,
-	                      GENERIC_READ|SYNCHRONIZE,
+	                      GENERIC_READ | SYNCHRONIZE,
 	                      &ObjectAttributes,
 	                      &IoStatusBlock,
 	                      FILE_SHARE_READ,
-	                      FILE_NON_DIRECTORY_FILE|FILE_SYNCHRONOUS_IO_NONALERT);
+	                      FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT);
 
 	RtlFreeHeap(RtlGetProcessHeap(), 0, FileNameString.Buffer);
 
diff --git a/reactos/dll/win32/kernel32/client/file/npipe.c b/reactos/dll/win32/kernel32/client/file/npipe.c
index 6f7c061a4fd..1844ef4a028 100644
--- a/reactos/dll/win32/kernel32/client/file/npipe.c
+++ b/reactos/dll/win32/kernel32/client/file/npipe.c
@@ -105,7 +105,7 @@ CreatePipe(PHANDLE hReadPipe,
 
     /* Now try opening it for write access */
     Status = NtOpenFile(&WritePipeHandle,
-                        FILE_GENERIC_WRITE | SYNCHRONIZE,
+                        FILE_GENERIC_WRITE,
                         &ObjectAttributes,
                         &StatusBlock,
                         FILE_SHARE_READ,
diff --git a/reactos/dll/win32/kernel32/client/file/volume.c b/reactos/dll/win32/kernel32/client/file/volume.c
index 3759e1ed6f8..62cc81bbf89 100644
--- a/reactos/dll/win32/kernel32/client/file/volume.c
+++ b/reactos/dll/win32/kernel32/client/file/volume.c
@@ -967,7 +967,7 @@ GetVolumeNameForVolumeMountPointW(
 
    RtlInitUnicodeString(&NtFileName, L"\\??\\MountPointManager");
    InitializeObjectAttributes(&ObjectAttributes, &NtFileName, 0, NULL, NULL);
-   Status = NtOpenFile(&FileHandle, FILE_GENERIC_READ | SYNCHRONIZE, &ObjectAttributes,
+   Status = NtOpenFile(&FileHandle, FILE_GENERIC_READ, &ObjectAttributes,
                        &Iosb, FILE_SHARE_READ | FILE_SHARE_WRITE,
                        FILE_SYNCHRONOUS_IO_NONALERT);
    if (!NT_SUCCESS(Status))
diff --git a/reactos/dll/win32/ntmarta/ntmarta.c b/reactos/dll/win32/ntmarta/ntmarta.c
index e45f1e596a3..bbb2a40911e 100644
--- a/reactos/dll/win32/ntmarta/ntmarta.c
+++ b/reactos/dll/win32/ntmarta/ntmarta.c
@@ -887,7 +887,7 @@ AccpOpenNamedObject(LPWSTR pObjectName,
                                        NULL);
 
             Status = NtOpenFile(Handle,
-                                DesiredAccess,
+                                DesiredAccess /* | SYNCHRONIZE */,
                                 &ObjectAttributes,
                                 &IoStatusBlock,
                                 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
diff --git a/reactos/lib/rtl/actctx.c b/reactos/lib/rtl/actctx.c
index 8dfaa4cb895..79ac971397c 100644
--- a/reactos/lib/rtl/actctx.c
+++ b/reactos/lib/rtl/actctx.c
@@ -1618,7 +1618,11 @@ static NTSTATUS open_nt_file( HANDLE *handle, UNICODE_STRING *name )
     attr.ObjectName = name;
     attr.SecurityDescriptor = NULL;
     attr.SecurityQualityOfService = NULL;
-    return NtOpenFile( handle, GENERIC_READ, &attr, &io, FILE_SHARE_READ, FILE_SYNCHRONOUS_IO_ALERT );
+    return NtOpenFile(handle,
+                      GENERIC_READ | SYNCHRONIZE,
+                      &attr, &io,
+                      FILE_SHARE_READ,
+                      FILE_SYNCHRONOUS_IO_ALERT);
 }
 
 static NTSTATUS get_module_filename( HMODULE module, UNICODE_STRING *str, USHORT extra_len )
@@ -1952,8 +1956,11 @@ static NTSTATUS lookup_winsxs(struct actctx_loader* acl, struct assembly_identit
     attr.SecurityDescriptor = NULL;
     attr.SecurityQualityOfService = NULL;
 
-    if (!NtOpenFile( &handle, GENERIC_READ, &attr, &io, FILE_SHARE_READ | FILE_SHARE_WRITE,
-                     FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT ))
+    if (!NtOpenFile(&handle,
+                    GENERIC_READ | SYNCHRONIZE,
+                    &attr, &io,
+                    FILE_SHARE_READ | FILE_SHARE_WRITE,
+                    FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT))
     {
         sxs_ai = *ai;
         file = lookup_manifest_file( handle, &sxs_ai );
diff --git a/reactos/ntoskrnl/io/iomgr/bootlog.c b/reactos/ntoskrnl/io/iomgr/bootlog.c
index 19affc9dfdc..bb2d8adfbd1 100644
--- a/reactos/ntoskrnl/io/iomgr/bootlog.c
+++ b/reactos/ntoskrnl/io/iomgr/bootlog.c
@@ -168,7 +168,7 @@ IopWriteLogFile(PWSTR LogText)
                                NULL);
 
     Status = ZwCreateFile(&FileHandle,
-                          FILE_APPEND_DATA,
+                          FILE_APPEND_DATA | SYNCHRONIZE,
                           &ObjectAttributes,
                           &IoStatusBlock,
                           NULL,
diff --git a/reactos/ntoskrnl/io/iomgr/ramdisk.c b/reactos/ntoskrnl/io/iomgr/ramdisk.c
index 5f37a1dc402..d07cb353155 100644
--- a/reactos/ntoskrnl/io/iomgr/ramdisk.c
+++ b/reactos/ntoskrnl/io/iomgr/ramdisk.c
@@ -161,7 +161,7 @@ IopStartRamdisk(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
     // Open a handle to the driver
     //
     Status = ZwOpenFile(&DriverHandle,
-                        GENERIC_ALL,
+                        GENERIC_ALL | SYNCHRONIZE,
                         &ObjectAttributes,
                         &IoStatusBlock,
                         FILE_SHARE_READ | FILE_SHARE_WRITE,
diff --git a/reactos/ntoskrnl/kdbg/kdb_cli.c b/reactos/ntoskrnl/kdbg/kdb_cli.c
index e7d04517647..c40c282438c 100644
--- a/reactos/ntoskrnl/kdbg/kdb_cli.c
+++ b/reactos/ntoskrnl/kdbg/kdb_cli.c
@@ -3578,7 +3578,8 @@ KdbpCliInit()
     InitializeObjectAttributes(&ObjectAttributes, &FileName, 0, NULL, NULL);
 
     /* Open the file */
-    Status = ZwOpenFile(&hFile, FILE_READ_DATA, &ObjectAttributes, &Iosb, 0,
+    Status = ZwOpenFile(&hFile, FILE_READ_DATA | SYNCHRONIZE,
+                        &ObjectAttributes, &Iosb, 0,
                         FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT |
                         FILE_NO_INTERMEDIATE_BUFFERING);
     if (!NT_SUCCESS(Status))
diff --git a/reactos/ntoskrnl/kdbg/kdb_symbols.c b/reactos/ntoskrnl/kdbg/kdb_symbols.c
index 2cb27c320c9..feb0fb1de73 100644
--- a/reactos/ntoskrnl/kdbg/kdb_symbols.c
+++ b/reactos/ntoskrnl/kdbg/kdb_symbols.c
@@ -391,10 +391,10 @@ KdbpSymLoadModuleSymbols(
     DPRINT("Attempting to open image: %wZ\n", FileName);
 
     Status = ZwOpenFile(&FileHandle,
-                        FILE_READ_ACCESS,
+                        FILE_READ_ACCESS | SYNCHRONIZE,
                         &ObjectAttributes,
                         &IoStatusBlock,
-                        FILE_SHARE_READ|FILE_SHARE_WRITE,
+                        FILE_SHARE_READ | FILE_SHARE_WRITE,
                         FILE_SYNCHRONOUS_IO_NONALERT);
     if (!NT_SUCCESS(Status))
     {