diff --git a/jerry-core/api/jerryscript.c b/jerry-core/api/jerryscript.c
index 60f8023fd0..5a874a3f32 100644
--- a/jerry-core/api/jerryscript.c
+++ b/jerry-core/api/jerryscript.c
@@ -172,6 +172,7 @@ jerry_return (const jerry_value_t value) /**< return value */
 void
 jerry_init (jerry_init_flag_t flags) /**< combination of Jerry flags */
 {
+  jerry_port_init ();
 #if JERRY_EXTERNAL_CONTEXT
   size_t total_size = jerry_port_context_alloc (sizeof (jerry_context_t));
   JERRY_UNUSED (total_size);
diff --git a/jerry-core/include/jerryscript-port.h b/jerry-core/include/jerryscript-port.h
index 0d8b34e1d4..420ecd9bdf 100644
--- a/jerry-core/include/jerryscript-port.h
+++ b/jerry-core/include/jerryscript-port.h
@@ -49,6 +49,11 @@ typedef enum
   JERRY_FATAL_FAILED_ASSERTION = 120 /**< Assertion failed */
 } jerry_fatal_code_t;
 
+/**
+ * Init the program
+ */
+void jerry_port_init (void);
+
 /**
  * Signal the port that the process experienced a fatal failure from which it cannot
  * recover.
diff --git a/jerry-port/common/jerry-port-process.c b/jerry-port/common/jerry-port-process.c
index 25c6f9027d..cbf943c03d 100644
--- a/jerry-port/common/jerry-port-process.c
+++ b/jerry-port/common/jerry-port-process.c
@@ -17,6 +17,18 @@
 
 #include "jerryscript-port.h"
 
+#if !defined(_WIN32)
+
+/**
+ * Default implementation of jerry_port_init. Do nothing.
+ */
+void JERRY_ATTR_WEAK
+jerry_port_init (void)
+{
+} /* jerry_port_init */
+
+#endif /* !defined(_WIN32) */
+
 /**
  * Default implementation of jerry_port_fatal. Calls 'abort' if exit code is
  * non-zero, 'exit' otherwise.
diff --git a/jerry-port/win/jerry-port-win-process.c b/jerry-port/win/jerry-port-win-process.c
index c4949a2bf5..e6b2288fc0 100644
--- a/jerry-port/win/jerry-port-win-process.c
+++ b/jerry-port/win/jerry-port-win-process.c
@@ -18,6 +18,68 @@
 
 #include <windows.h>
 
+#include <crtdbg.h>
+#include <stdio.h>
+
+void
+jerry_port_init (void)
+{
+  if (!IsDebuggerPresent ())
+  {
+    /* Make output streams unbuffered by default */
+    setvbuf (stdout, NULL, _IONBF, 0);
+    setvbuf (stderr, NULL, _IONBF, 0);
+
+    /*
+     * By default abort() only generates a crash-dump in *non* debug
+     * builds. As our Assert() / ExceptionalCondition() uses abort(),
+     * leaving the default in place would make debugging harder.
+     *
+     * MINGW's own C runtime doesn't have _set_abort_behavior(). When
+     * targeting Microsoft's UCRT with mingw, it never links to the debug
+     * version of the library and thus doesn't need the call to
+     * _set_abort_behavior() either.
+     */
+#if !defined(__MINGW32__) && !defined(__MINGW64__)
+    _set_abort_behavior (_CALL_REPORTFAULT | _WRITE_ABORT_MSG, _CALL_REPORTFAULT | _WRITE_ABORT_MSG);
+#endif /* !defined(__MINGW32__) && !defined(__MINGW64__) */
+
+    /*
+     * SEM_FAILCRITICALERRORS causes more errors to be reported to
+     * callers.
+     *
+     * We used to also specify SEM_NOGPFAULTERRORBOX, but that prevents
+     * windows crash reporting from working. Which includes registered
+     * just-in-time debuggers, making it unnecessarily hard to debug
+     * problems on windows. Now we try to disable sources of popups
+     * separately below (note that SEM_NOGPFAULTERRORBOX did not actually
+     * prevent all sources of such popups).
+     */
+    SetErrorMode (SEM_FAILCRITICALERRORS);
+
+    /*
+     * Show errors on stderr instead of popup box (note this doesn't
+     * affect errors originating in the C runtime, see below).
+     */
+    _set_error_mode (_OUT_TO_STDERR);
+
+    /*
+     * In DEBUG builds, errors, including assertions, C runtime errors are
+     * reported via _CrtDbgReport. By default such errors are displayed
+     * with a popup (even with NOGPFAULTERRORBOX), preventing forward
+     * progress. Instead report such errors stderr (and the debugger).
+     * This is C runtime specific and thus the above incantations aren't
+     * sufficient to suppress these popups.
+     */
+    _CrtSetReportMode (_CRT_ERROR, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
+    _CrtSetReportFile (_CRT_ERROR, _CRTDBG_FILE_STDERR);
+    _CrtSetReportMode (_CRT_ASSERT, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
+    _CrtSetReportFile (_CRT_ASSERT, _CRTDBG_FILE_STDERR);
+    _CrtSetReportMode (_CRT_WARN, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
+    _CrtSetReportFile (_CRT_WARN, _CRTDBG_FILE_STDERR);
+  }
+} /* jerry_port_init */
+
 /**
  * Default implementation of jerry_port_sleep, uses 'Sleep'.
  */