diff --git a/libc/intrin/fds.c b/libc/intrin/fds.c
index d2883cccf..67e610bfc 100644
--- a/libc/intrin/fds.c
+++ b/libc/intrin/fds.c
@@ -129,6 +129,7 @@ textstartup void __init_fds(int argc, char **argv, char **envp) {
   if (IsWindows()) {
     const char *fdspec;
     if ((fdspec = getenv("_COSMO_FDS_V2"))) {
+      char *smaddr = 0;
       unsetenv("_COSMO_FDS");
       unsetenv("_COSMO_FDS_V2");
       for (;;) {
@@ -171,8 +172,13 @@ textstartup void __init_fds(int argc, char **argv, char **envp) {
         if (shand) {
           struct Map *map;
           struct CursorShared *shared;
+          if (!smaddr) {
+            smaddr = __maps_randaddr();
+          } else {
+            smaddr += 65536;
+          }
           if ((shared = MapViewOfFileEx(shand, kNtFileMapWrite, 0, 0,
-                                        sizeof(struct CursorShared), 0))) {
+                                        sizeof(struct CursorShared), smaddr))) {
             if ((f->cursor = _mapanon(sizeof(struct Cursor)))) {
               f->cursor->shared = shared;
               if ((map = __maps_alloc())) {
diff --git a/libc/intrin/printmapswin32.c b/libc/intrin/printmapswin32.c
new file mode 100644
index 000000000..65fbcd1e3
--- /dev/null
+++ b/libc/intrin/printmapswin32.c
@@ -0,0 +1,65 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8                               :vi │
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2024 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/fmt/conv.h"
+#include "libc/intrin/describeflags.h"
+#include "libc/intrin/kprintf.h"
+#include "libc/macros.h"
+#include "libc/nt/enum/memflags.h"
+#include "libc/nt/memory.h"
+#include "libc/runtime/runtime.h"
+#include "libc/str/str.h"
+
+static const struct DescribeFlags kNtMemState[] = {
+    {kNtMemCommit, "Commit"},    //
+    {kNtMemFree, "Free"},        //
+    {kNtMemReserve, "Reserve"},  //
+};
+
+const char *DescribeNtMemState(char buf[64], uint32_t x) {
+  return _DescribeFlags(buf, 64, kNtMemState, ARRAYLEN(kNtMemState), "kNtMem",
+                        x);
+}
+
+static const struct DescribeFlags kNtMemType[] = {
+    {kNtMemImage, "Image"},      //
+    {kNtMemMapped, "Mapped"},    //
+    {kNtMemPrivate, "Private"},  //
+};
+
+const char *DescribeNtMemType(char buf[64], uint32_t x) {
+  return _DescribeFlags(buf, 64, kNtMemType, ARRAYLEN(kNtMemType), "kNtMem", x);
+}
+
+void __print_maps_win32(void) {
+  char *p, b[5][64];
+  struct NtMemoryBasicInformation mi;
+  kprintf("%-12s %-12s %10s %16s %16s %32s %32s\n", "Allocation", "BaseAddress",
+          "RegionSize", "State", "Type", "AllocationProtect", "Protect");
+  for (p = 0;; p = (char *)mi.BaseAddress + mi.RegionSize) {
+    bzero(&mi, sizeof(mi));
+    if (!VirtualQuery(p, &mi, sizeof(mi)))
+      break;
+    sizefmt(b[0], mi.RegionSize, 1024);
+    kprintf("%.12lx %.12lx %10s %16s %16s %32s %32s\n", mi.AllocationBase,
+            mi.BaseAddress, b[0], DescribeNtMemState(b[1], mi.State),
+            DescribeNtMemType(b[2], mi.Type),
+            _DescribeNtPageFlags(b[3], mi.AllocationProtect),
+            _DescribeNtPageFlags(b[4], mi.Protect));
+  }
+}
diff --git a/libc/proc/fork-nt.c b/libc/proc/fork-nt.c
index f889d3e8b..ce5907a8a 100644
--- a/libc/proc/fork-nt.c
+++ b/libc/proc/fork-nt.c
@@ -125,11 +125,9 @@ static dontinline textwindows ssize_t ForkIo2(
 static dontinline textwindows bool WriteAll(int64_t h, void *buf, size_t n) {
   bool ok;
   ok = ForkIo2(h, buf, n, (void *)WriteFile, "WriteFile", false) != -1;
-  if (!ok) {
+  if (!ok)
     STRACE("fork() failed in parent due to WriteAll(%ld, %p, %'zu) → %u", h,
            buf, n, GetLastError());
-    __print_maps(0);
-  }
   return ok;
 }
 
diff --git a/libc/runtime/runtime.h b/libc/runtime/runtime.h
index 452125bcb..58fde8c23 100644
--- a/libc/runtime/runtime.h
+++ b/libc/runtime/runtime.h
@@ -95,6 +95,7 @@ int ftrace_install(void) libcesque;
 int ftrace_enabled(int) libcesque;
 int strace_enabled(int) libcesque;
 void __print_maps(size_t) libcesque;
+void __print_maps_win32(void) libcesque;
 void __printargs(const char *) libcesque;
 /* builtin sh-like system/popen dsl */
 int _cocmd(int, char **, char **) libcesque;