diff --git a/.gitignore b/.gitignore
index 47acc836..3018cf70 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,7 +11,6 @@ release/*
 /dll/net.pb.h
 base.exp
 base.lib
-rtlgenrandom*
 steamclient.exp
 steamclient.lib
 out/*
diff --git a/dll/base.cpp b/dll/base.cpp
index 507e0348..ab52edae 100644
--- a/dll/base.cpp
+++ b/dll/base.cpp
@@ -22,8 +22,9 @@
 static void
 randombytes(char * const buf, const size_t size)
 {
-    while (!RtlGenRandom((PVOID) buf, (ULONG) size)) {
-        PRINT_DEBUG("RtlGenRandom ERROR\n");
+    // NT_SUCCESS is: return value >= 0, including Ntdef.h causes so many errors
+    while (BCryptGenRandom(NULL, (PUCHAR) buf, (ULONG) size, BCRYPT_USE_SYSTEM_PREFERRED_RNG) < 0) {
+        PRINT_DEBUG("BCryptGenRandom ERROR\n");
         Sleep(100);
     }
 
diff --git a/dll/common_includes.h b/dll/common_includes.h
index 3b435456..964535ae 100644
--- a/dll/common_includes.h
+++ b/dll/common_includes.h
@@ -61,9 +61,7 @@
 
     #define MSG_NOSIGNAL 0
 
-    #define SystemFunction036 NTAPI SystemFunction036
-    #include <ntsecapi.h>
-    #undef SystemFunction036
+    #include <bcrypt.h>
 
     #ifndef EMU_RELEASE_BUILD
         #define PRINT_DEBUG(a, ...) do {FILE *t = fopen("STEAM_LOG.txt", "a"); fprintf(t, "%u " a, GetCurrentThreadId(), __VA_ARGS__); fclose(t); WSASetLastError(0);} while (0)
diff --git a/dll/rtlgenrandom.c b/dll/rtlgenrandom.c
deleted file mode 100644
index e160da46..00000000
--- a/dll/rtlgenrandom.c
+++ /dev/null
@@ -1,4 +0,0 @@
-#include <windows.h>
-#define RtlGenRandom SystemFunction036
-#define DLLEXPORT 	__declspec(dllexport)
-DLLEXPORT BOOLEAN WINAPI RtlGenRandom(PVOID in, ULONG len) {}
\ No newline at end of file
diff --git a/dll/rtlgenrandom.def b/dll/rtlgenrandom.def
deleted file mode 100644
index 3f23d20e..00000000
--- a/dll/rtlgenrandom.def
+++ /dev/null
@@ -1,3 +0,0 @@
-LIBRARY advapi32.dll
-EXPORTS
-SystemFunction036
\ No newline at end of file