diff --git a/src/sys/fsext.c b/src/sys/fsext.c
index 38272502..5d0e6228 100644
--- a/src/sys/fsext.c
+++ b/src/sys/fsext.c
@@ -70,7 +70,7 @@ FSP_FSEXT_PROVIDER *FspFsextProvider(UINT32 FsextControlCode, PNTSTATUS PLoadRes
 
             RtlInitEmptyUnicodeString(&Path, Buf, sizeof Buf);
             Result = RtlUnicodeStringPrintf(&Path,
-                L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\%s", Value.V.Data);
+                L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\%s", (PWSTR)Value.V.Data);
             ASSERT(NT_SUCCESS(Result));
 
             Result = ZwLoadDriver(&Path);
diff --git a/src/sys/mup.c b/src/sys/mup.c
index 23613b9b..88643f45 100644
--- a/src/sys/mup.c
+++ b/src/sys/mup.c
@@ -275,6 +275,7 @@ NTSTATUS FspMupHandleIrp(
             if (FspFileNodeIsValid(FileObject->FsContext))
                 FsvolDeviceObject = ((FSP_FILE_NODE *)FileObject->FsContext)->FsvolDeviceObject;
             else if (0 != FileObject->FsContext2 &&
+#pragma prefast(disable:28175, "We are a filesystem: ok to access DeviceObject->Type")
                 3 == ((PDEVICE_OBJECT)FileObject->FsContext2)->Type &&
                 0 != ((PDEVICE_OBJECT)FileObject->FsContext2)->DeviceExtension &&
                 FspFsvolDeviceExtensionKind == FspDeviceExtension((PDEVICE_OBJECT)FileObject->FsContext2)->Kind)
diff --git a/src/sys/util.c b/src/sys/util.c
index 1268f7cf..dc981026 100644
--- a/src/sys/util.c
+++ b/src/sys/util.c
@@ -350,9 +350,9 @@ NTSTATUS FspSendSetInformationIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT File
     IrpSp->Parameters.SetFile.FileInformationClass = FileInformationClass;
     IrpSp->Parameters.SetFile.Length = Length;
 
+    KeInitializeEvent(&Context.Event, NotificationEvent, FALSE);
     IoSetCompletionRoutine(Irp, FspSendIrpCompletion, &Context, TRUE, TRUE, TRUE);
 
-    KeInitializeEvent(&Context.Event, NotificationEvent, FALSE);
     Result = IoCallDriver(DeviceObject, Irp);
     if (STATUS_PENDING == Result)
         KeWaitForSingleObject(&Context.Event, Executive, KernelMode, FALSE, 0);
@@ -391,9 +391,9 @@ NTSTATUS FspSendQuerySecurityIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileO
     IrpSp->Parameters.QuerySecurity.SecurityInformation = SecurityInformation;
     IrpSp->Parameters.QuerySecurity.Length = Length;
 
+    KeInitializeEvent(&Context.Event, NotificationEvent, FALSE);
     IoSetCompletionRoutine(Irp, FspSendIrpCompletion, &Context, TRUE, TRUE, TRUE);
 
-    KeInitializeEvent(&Context.Event, NotificationEvent, FALSE);
     Result = IoCallDriver(DeviceObject, Irp);
     if (STATUS_PENDING == Result)
         KeWaitForSingleObject(&Context.Event, Executive, KernelMode, FALSE, 0);
@@ -433,9 +433,9 @@ NTSTATUS FspSendQueryEaIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
     IrpSp->Parameters.QueryEa.EaList = GetEa;
     IrpSp->Parameters.QueryEa.EaListLength = GetEaLength;
 
+    KeInitializeEvent(&Context.Event, NotificationEvent, FALSE);
     IoSetCompletionRoutine(Irp, FspSendIrpCompletion, &Context, TRUE, TRUE, TRUE);
 
-    KeInitializeEvent(&Context.Event, NotificationEvent, FALSE);
     Result = IoCallDriver(DeviceObject, Irp);
     if (STATUS_PENDING == Result)
         KeWaitForSingleObject(&Context.Event, Executive, KernelMode, FALSE, 0);