How To Configure Computer To Automatically Wake Up For Remote Desktop Access In Windows 7/Vista/XP
If you connect to your computer using Remote Desktop and don’t want to leave your computer running all the time, then you can configure your Windows PC (including Windows XP, Windows Vista, and Windows 7) to wake up from sleep as you start using the Remote Desktop. This means you need to put into Remote PC into Sleep mode and then you can wake it up from sleep mode remotely by configuring it.
Follow step-by-step- guide below:
1. Click “Start” button, right-click on “My Computer” and click on “Manage”.

2. In the left pane of the “Computer Management” window, click on “Device Manager”.

3. In the right side pane, expand “Network Adapters” item. Then right-click on the network adapter which you are using for your network connection and click “Properties”. For example in our case, it’s “Intel® PRO/100 VE Network Connection”.

4. In the Network Connection Properties dialog box, click on “Power Management” tab.

5. Click the check the box “Allow this device to wake the computer”.
6. Click OK.