diff --git a/ZuneModCore/FileUtil.cs b/ZuneModCore/FileUtil.cs
new file mode 100644
index 0000000..f07c01f
--- /dev/null
+++ b/ZuneModCore/FileUtil.cs
@@ -0,0 +1,151 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ZuneModCore
+{
+    using System.Runtime.InteropServices;
+    using System.Diagnostics;
+    using System;
+    using System.Collections.Generic;
+
+    static public class FileUtil
+    {
+        [StructLayout(LayoutKind.Sequential)]
+        struct RM_UNIQUE_PROCESS
+        {
+            public int dwProcessId;
+            public System.Runtime.InteropServices.ComTypes.FILETIME ProcessStartTime;
+        }
+
+        const int RmRebootReasonNone = 0;
+        const int CCH_RM_MAX_APP_NAME = 255;
+        const int CCH_RM_MAX_SVC_NAME = 63;
+
+        enum RM_APP_TYPE
+        {
+            RmUnknownApp = 0,
+            RmMainWindow = 1,
+            RmOtherWindow = 2,
+            RmService = 3,
+            RmExplorer = 4,
+            RmConsole = 5,
+            RmCritical = 1000
+        }
+
+        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+        struct RM_PROCESS_INFO
+        {
+            public RM_UNIQUE_PROCESS Process;
+
+            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCH_RM_MAX_APP_NAME + 1)]
+            public string strAppName;
+
+            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCH_RM_MAX_SVC_NAME + 1)]
+            public string strServiceShortName;
+
+            public RM_APP_TYPE ApplicationType;
+            public uint AppStatus;
+            public uint TSSessionId;
+            [MarshalAs(UnmanagedType.Bool)]
+            public bool bRestartable;
+        }
+
+        [DllImport("rstrtmgr.dll", CharSet = CharSet.Unicode)]
+        static extern int RmRegisterResources(uint pSessionHandle,
+                                              UInt32 nFiles,
+                                              string[] rgsFilenames,
+                                              UInt32 nApplications,
+                                              [In] RM_UNIQUE_PROCESS[] rgApplications,
+                                              UInt32 nServices,
+                                              string[] rgsServiceNames);
+
+        [DllImport("rstrtmgr.dll", CharSet = CharSet.Auto)]
+        static extern int RmStartSession(out uint pSessionHandle, int dwSessionFlags, string strSessionKey);
+
+        [DllImport("rstrtmgr.dll")]
+        static extern int RmEndSession(uint pSessionHandle);
+
+        [DllImport("rstrtmgr.dll")]
+        static extern int RmGetList(uint dwSessionHandle,
+                                    out uint pnProcInfoNeeded,
+                                    ref uint pnProcInfo,
+                                    [In, Out] RM_PROCESS_INFO[] rgAffectedApps,
+                                    ref uint lpdwRebootReasons);
+
+        /// <summary>
+        /// Find out what process(es) have a lock on the specified file.
+        /// </summary>
+        /// <param name="path">Path of the file.</param>
+        /// <returns>Processes locking the file</returns>
+        /// <remarks>See also:
+        /// http://msdn.microsoft.com/en-us/library/windows/desktop/aa373661(v=vs.85).aspx
+        /// http://wyupdate.googlecode.com/svn-history/r401/trunk/frmFilesInUse.cs (no copyright in code at time of viewing)
+        /// 
+        /// </remarks>
+        static public List<Process> WhoIsLocking(string path)
+        {
+            uint handle;
+            string key = Guid.NewGuid().ToString();
+            List<Process> processes = new List<Process>();
+
+            int res = RmStartSession(out handle, 0, key);
+            if (res != 0) throw new Exception("Could not begin restart session.  Unable to determine file locker.");
+
+            try
+            {
+                const int ERROR_MORE_DATA = 234;
+                uint pnProcInfoNeeded = 0,
+                     pnProcInfo = 0,
+                     lpdwRebootReasons = RmRebootReasonNone;
+
+                string[] resources = new string[] { path }; // Just checking on one resource.
+
+                res = RmRegisterResources(handle, (uint)resources.Length, resources, 0, null, 0, null);
+
+                if (res != 0) throw new Exception("Could not register resource.");
+
+                //Note: there's a race condition here -- the first call to RmGetList() returns
+                //      the total number of process. However, when we call RmGetList() again to get
+                //      the actual processes this number may have increased.
+                res = RmGetList(handle, out pnProcInfoNeeded, ref pnProcInfo, null, ref lpdwRebootReasons);
+
+                if (res == ERROR_MORE_DATA)
+                {
+                    // Create an array to store the process results
+                    RM_PROCESS_INFO[] processInfo = new RM_PROCESS_INFO[pnProcInfoNeeded];
+                    pnProcInfo = pnProcInfoNeeded;
+
+                    // Get the list
+                    res = RmGetList(handle, out pnProcInfoNeeded, ref pnProcInfo, processInfo, ref lpdwRebootReasons);
+                    if (res == 0)
+                    {
+                        processes = new List<Process>((int)pnProcInfo);
+
+                        // Enumerate all of the results and add them to the 
+                        // list to be returned
+                        for (int i = 0; i < pnProcInfo; i++)
+                        {
+                            try
+                            {
+                                processes.Add(Process.GetProcessById(processInfo[i].Process.dwProcessId));
+                            }
+                            // catch the error -- in case the process is no longer running
+                            catch (ArgumentException) { }
+                        }
+                    }
+                    else throw new Exception("Could not list processes locking resource.");
+                }
+                else if (res != 0) throw new Exception("Could not list processes locking resource. Failed to get size of result.");
+            }
+            finally
+            {
+                RmEndSession(handle);
+            }
+
+            return processes;
+        }
+    }
+}
diff --git a/ZuneModCore/Mods/VideoSyncMod.cs b/ZuneModCore/Mods/VideoSyncMod.cs
index 51abcca..629df66 100644
--- a/ZuneModCore/Mods/VideoSyncMod.cs
+++ b/ZuneModCore/Mods/VideoSyncMod.cs
@@ -26,6 +26,13 @@ namespace ZuneModCore.Mods
                 // Make a backup of the file
                 File.Copy(WMVCORE_PATH, Path.Combine(StorageDirectory, "WMVCORE.original.dll"), true);
 
+                // NOTE: This is quite dangerous to do blindly, so let's not
+                // Kill processes that are using WMVCORE.dll
+                //foreach (System.Diagnostics.Process proc in FileUtil.WhoIsLocking(WMVCORE_PATH))
+                //{
+                //    proc.Kill();
+                //}
+
                 // Copy the pre-Anniversary Update WMVCORE.dll
                 File.Copy("Resources\\WMVCORE.dll", WMVCORE_PATH, true);