What is Presentation Mode? This mode lets users easily turn on their laptop & projector screen at the same time by simply pressing the key Win + P (some other features also). Here is how to enable Presentation mode in Windows 7 desktop PC
- Open Registry Editor as an administrator (Start – Run and enter regedit to get Registry Editor. Right click it and select ‘Run as Administrator’) 
- In the Registry Editor, navigate to HKEY_CURRENT_USER\Software\Microsoft. Right click Microsoft and create a new key and name it MobilePC 
- Now right click MobilePC and create two new keys. Name them AdaptableSettings and MobilityCenter 
- In AdaptableSettings, right click and select ‘New DWORD Value’ and enter SkipBatteryCheck. Double click this new entry and enter 1 an click OK to save it. 
- In MobilityCenter, right click and select New DWORD Value and enter RunOnDesktop. Double click this new entry and enter 1 and click OK to save it. 
- Close Registry Editor and enter mblctr in the search box (Start – Run) to bring Windows Mobility Center. Create a short cut to desktop for easy access. 
Now you can run Windows Mobility Center in Windows 7 and also Vista which will give all functions including Presentation Mode. Hope you will enjoy this post and thanks to Prajith for giving this tips.