NO AUDIO OUTPUT DEVICE IS INSTALLED

might need to go in a do a system restore to a point before the upgarade

Install driver upgrade from dell site

Let me show you what is the problem:
1. You didn't tell us what is your Dell laptop model.
2. You didn't tell us what Windows Vista version do you have. (Ultimate, Home Premium, Home Basic, 32-bit, 64-bit)
3. What happened that led to your laptop not displaying any more any Audio Output devices.
You see, we can't read minds and without all the above information we can't help you.

Hi,
For Vista Home Basic >>>

• 1 GHz 32-bit (x86) or 64-bit (x64) processor
  
• 512 MB of system memory
  
• 20 GB hard drive with at least 15 GB of available space
  
• Support for DirectX 9 graphics and 32 MB of graphics memory
  
• DVD-ROM drive
  
• Audio Output
  
• Internet access (fees may apply)
  

Additional requirements Actual requirements and product functionality may vary based on your system configuration. Windows Vista Upgrade Advisor can help you determine which features and edition of Windows Vista will run on your computer.
While all editions of Windows Vista can support multiple core CPUs, only Windows Vista Business, Ultimate, and Enterprise can support dual processors.


For Vista Home Premium, Business and Ultimate >>>>>>

• 1 GHz 32-bit (x86) or 64-bit (x64) processor
  
• 1 GB of system memory
  
• 40 GB hard drive with at least 15 GB of available space
  
• Support for DirectX 9 graphics with:
  
  • WDDM Driver
    
  • 128 MB of graphics memory (minimum)
    
  • Pixel Shader 2.0 in hardware
    
  • 32 bits per pixel
    
• DVD-ROM drive
  
• Audio Output
  
• Internet access (fees may apply)
  

Additional requirements Actual requirements and product functionality may vary based on your system configuration. Windows Vista Upgrade Advisor can help you determine which features and edition of Windows Vista will run on your computer.
While all editions of Windows Vista can support multiple core CPUs, only Windows Vista Business, Ultimate, and Enterprise can support dual processors.
Home Premium / UltimateTV tuner card required for TV functionality (compatible remote control optional).
Home Premium / Business / UltimateWindows Tablet and Touch Technology requires a Tablet PC or a touch screen.
UltimateWindows BitLocker Drive Encryption requires a USB Flash Drive and a system with a TPM 1.2 chip.

Windows Vista minimum supported system requirements Home Basic / Home Premium / Business / Ultimate

• 800 MHz processor and 512 MB of system memory
  
• 20 GB hard drive with at least 15 GB of available space
  
• Support for Super VGA graphics
  
• CD-ROM drive
  

Regards.

This from the Webroot Web site on supported operating systems:

Windows Vista® (32-bit versions of Home Basic, Premium, Business, or Ultimate), Vista SP1 (32- and 64 bit versions of (Home Basic, Premium, Business, or Ultimate).

So, assuming you have bought the latest Spysweeper (and assuming you have Vista 64 bit) , then you need to upgrade your Vista to SP1.

well u cannot Update ur Vista Basic to Premium freely.U need to Purchase the Vista Premium and then Upgrade on ur system.

The product key on the label on the bottom of the laptop will only work for the version of Windows that was installed on that laptop.
You can purchase an upgrade Windows Vista Ultimate and to use in conjunction with the existing Vista Home Premium.

You need to download and install the Vista compatible driver from the manufacturer of your sound card.
It is possible that if your card is old, it cannot be supported by Vista, and you will need to replace it.

FW

just right click my computer then select properties and click the upgrade

windows key + R = open : devmgmt.msc
Sounds, video and game controlers > (right click) Realtek high definition audio > update driver sofware > browse my computer for driver software > let me pick from a list...> double click on Realtek high definition audio > YES to update driver warning > AND SWEET SOUND IS AUDIBLE :D