[Anonymous]

Error message during install on new HP Windows 7 PC;

"Module C:\Program Files\Classic Shell\ClassicExporer32.dll failed to register. HRESULT -2147024891. Contact your support personnel."

After clicking "Ignore," installation appears to complete, but the status bar does not display file size.

The error code means "access denied". It is not clear access to what though.
Open an admin command prompt, go to the folder C:\Program Files\Classic Shell, and type:
regsvr32 ClassicExplorer32.dll
Hopefully this will provide more information about the cause of the error.

RegSvr32 response:

"The module "ClassicExplorer32.dell" was loaded but the call to DllRegisterServer failed with error code 0x80070005."

Pretty much all of what DllRegisterServer does is to write to the registry. Maybe your registry is somehow locked for the current user. Run regedit as admin and see if you can create new keys under HKCR or HKCR\CLSID.