Clock problem when running Windows and Linux on same computer

When you install both Windows and Linux on the same machine (using dual/multi-boot), you get into an annoying problem with the system time:

• Linux uses the internal clock as UTC/GMT
• Windows uses the internal clock as Local Time.

On my box, in Belgium, this currently gives a difference of 2 hours (1 hour + 1 hour for daylight saving time) between my Windows 7 and Ubuntu.  After some time, the time is corrected because the operating systems syncs its time with an NTP-server on the internet.  But after booting into the other operating system, the problem repeats itself evidently.

This problem can be solved either in Windows or in Ubuntu.  I have chosen to change the Windows configuration:

• Start regedit.exe
• Go to the key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation
• If it doesn't exist, add a new key (or change the existing):
  Set "RealTimeIsUniversal" as DWORD to "1"
• Reboot

You can also solve it in Linux:

• Open the file "/etc/default/rcS". When using a graphical shell like Unity or Gnome:
• start a terminal window by pressing Ctrl-Alt-T
• run "sudo gedit /etc/default/rcS" 
• Look for the line "UTC=yes", and change it to "UTC=no"