System Not Eligible for Upgrade when Attempting to Upgrade to Media Center 2005

System Not Eligible for Upgrade when Attempting to Upgrade to Media Center 2005
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Click Start, Run, and type the following into the open field: regsvr32 rdbios32.dll
Click OK.
The message DllRegisterServer in rdbios32.dll succeeded appears when the file is properly registered.
Click OK to close the Window.
Try upgrading again: insert the upgrade CD or Open My Computer, right-click HP_MC_2005_UPGRADE, and select Run Media Center 2005 Upgrade.