To change the default startup folder for Windows Explorer: 1. Click Start , point to All Programs , point to Accessories , and then right-click Windows Explorer .
2. On the menu that appears, click Properties .
3. In the Target box, append the "/root" command-line switch to the "%SystemRoot%\Explorer.exe" command, using the startup location that you want. For example, if you want Windows Explorer to start at the root of drive C, edit the command to the following:
%SystemRoot%\Explorer.exe /root, C:\