• former sysinternals, now part of microsoft.
• Total Commander
• O'Reilly's Windows XP Annoyances
• prefetch
• timeup.cpp - shows the time win32 system is running
• examples of batch files
• cmd.exe returning error code from programs: %ERRORLEVEL%
• how to read from stdin in batch file:

  SET /P OUTPUT="yoyo"
  echo %OUTPUT%"
  

• to get boot menu (safe mode etc.), press F8 on startup
• how to create Windows XP boot floppy
• linux-ntfs (including ntfsresize) with a nice NTFS FAQ
• Offline NT password & registry editor (good also for windows XP)
• "Windows live" and "MSN" "help": http://help.live.com/ (the search at that site is a total crap, so use google to search there)
• to find MAC address of a network device, use ipconfig /all
• to change keyboard layout: Microsoft Keyboard Layout Creator
• To automate GUI: Win32::GuiTest (works fine with perl from cygwin). Example of automatically pressing button in windows commander nag screen: wincmd.pl.

Visual C++ etc.

• win32 API
• Visual C++ doc

• An error "This is not a Visual C" project file (or something like that) could be caused by that file being in Unix format. Convert to DOS one.
• a linker error about duplicate symbols in different run-time libraries (MSCVRT.lib, LIBCMT.lib, etc.) is caused by mix of different linker flags; see relevant visual studio doc.