Remote Control your Vista or WXP System With GRC
Open a file, an application, a webpage or shutdown the pc.
GRC is a software for the gmail users which allow to command their pc in remote way, sending only an email to your Gmail account (from whichever computer or hand phone). At this moment, GRC works in Windows Vista/XP and your remote Window Vista/XP machine has to be connected to the Internet at all time.
First you need to download GRC from here and MSINET.ocx file from here
or
Download both files from here
After downloading Extract the GRC.zip and double click on the program. It will show an error message that MSINET.ocx file is not found. Now, copy the MSINET.ocx file that you have downloaded to C:/Windows/System32.
Now try to run the GRC again. A small window similar to the following screen will pop up

The predefined tag is [open] and [/open]. If you want to change it, click on Setting (You can't access the Setting when you are logged in) and change the configuration to what you desire.

Login to your gmail account. GRC will now access your Gmail account every 60secs to check for new instructions.
To remote command your PC, you can send an empty email to your Gmail account with the following subject:
To open a file:
[open]C:\Documents and Settings\admin\Desktop\windows.jpg[/open]
To open an application (such as MS Word, calculator, paint)
[open]C:\Program Files\Microsoft Office\Office12\winword.exe[/open]
open]c:\windows\system32\calc.exe[/open]
In this example it will execute the calculator. The path within the tags [open] and [/open], specify the application to execute.
To open a webpage
[open]http://www.windowsreference.com[/open]
To shutdown the computer
shutdown or [open]shutdown[/open]
This Article clipped from Windows Reference - http://www.windowsreference.comArticle URL: http://www.windowsreference.com/free-utilities/howto-remote-control-your-computer-with-gmail-remote-command-grc/