I don't know if anyone has had the same annoying little problem I had: Although the option was selected to open windows in same window, ( Folders Options) it simply didn't play ball, I could if I let it, end up with a darn great row of open windows in Windows Explorer. I did some hunting around and found a little batch file to correct the problem.
Not only does he provide the solution he explains the problem, which is way way up there above my head.
Click Hereand in case the link disappears, attached is the zip file of the batch script, have ran virus etc tests. Just extract the file and click on it, make sure you have admin rights