Fix hang when resizing in diff mode and there are concealed items.
diff --git a/runtime/doc/os_win32.txt b/runtime/doc/os_win32.txt
index 02641d9..caa2597 100644
--- a/runtime/doc/os_win32.txt
+++ b/runtime/doc/os_win32.txt
@@ -7,10 +7,13 @@
*win32* *Win32* *MS-Windows*
This file documents the idiosyncrasies of the Win32 version of Vim.
-The Win32 version of Vim works on both Windows NT and Windows 95. There are
-both console and GUI versions. There is GUI version for use in the Win32s
-subsystem in Windows 3.1[1]. You can also use the 32-bit DOS version of Vim
-instead. See |os_msdos.txt|.
+The Win32 version of Vim works on Windows NT, 95, 98, ME, XP, Vista and
+Windows 7. There are both console and GUI versions.
+
+The 32 bit version also runs on 64 bit MS-Windows systems.
+
+There is GUI version for use in the Win32s subsystem in Windows 3.1[1]. You
+can also use the 32-bit DOS version of Vim instead. See |os_msdos.txt|.
1. Known problems |win32-problems|
2. Startup |win32-startup|