diff --git a/DDrawCompat/DllMain.cpp b/DDrawCompat/DllMain.cpp
index 4c4d219..b22a592 100644
--- a/DDrawCompat/DllMain.cpp
+++ b/DDrawCompat/DllMain.cpp
@@ -179,6 +179,8 @@ BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID /*lpvReserved*/)
 		VISIT_ALL_DDRAW_PROCS(LOAD_ORIGINAL_DDRAW_PROC);
 		Compat::origProcs.DirectInputCreateA = GetProcAddress(g_origDInputModule, "DirectInputCreateA");
 
+		const BOOL disablePriorityBoost = TRUE;
+		SetProcessPriorityBoost(GetCurrentProcess(), disablePriorityBoost);
 		SetProcessAffinityMask(GetCurrentProcess(), 1);
 		SetThemeAppProperties(0);
 		Time::init();
diff --git a/DDrawCompat/RealPrimarySurface.cpp b/DDrawCompat/RealPrimarySurface.cpp
index 7f123fa..74f3809 100644
--- a/DDrawCompat/RealPrimarySurface.cpp
+++ b/DDrawCompat/RealPrimarySurface.cpp
@@ -121,7 +121,7 @@ namespace
 		if (!g_updateThread)
 		{
 			g_updateThread = CreateThread(nullptr, 0, &updateThreadProc, nullptr, 0, nullptr);
-			SetThreadPriority(g_updateThread, THREAD_PRIORITY_ABOVE_NORMAL);
+			SetThreadPriority(g_updateThread, THREAD_PRIORITY_TIME_CRITICAL);
 		}
 
 		surface->SetPrivateData(surface, IID_IReleaseNotifier,