After upgrading to Windows 7 my laptop no longer recognizes my external monitor [Solved]

After upgrading to Windows 7 my laptop no longer recognizes my external monitor

After upgrading my laptop (Dell XTSM1330) from Vista to Windows 7 Home Premium, it no longer recognizes my external monitor (Dell 2407WFT-HC).
Is there a procedure in Win 7 whereby it has to recognize or "install" the monitor?

Anwsers to the Problem After upgrading to Windows 7 my laptop no longer recognizes my external monitor

Download Error Fixer (Free)

You should update your video driver to the latest 195.62 driver.

Your chipset drivers may benefit from
http://downloadcenter.intel.com/Default.aspx?lang=eng

This particular error can easily be resolved with a few simple steps. However, if you are not confident in your ability to use the methods below or they do not fully remove the issue on your computer, you may want to seek the assistance of a qualified repair technician who is well versed in fixing After upgrading to Windows 7 my laptop no longer recognizes my external monitor.

1. Back-up the Registry of your operating system.
2. Find the Registry Key: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\OSUpgrade]
3. Note: this Registry Key should already exist, if it does not exist, create it.
4. Create a brand new DWORD Value that is named AllowOsUpdate
5. Set the Value to 0x00000001.
6. Close and reopen your Control Panel.
7. Restart the Microsoft Windows.

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