I have a Sony VAIO laptop (VGN-C190P) and received the express upgrade kit for Windows Vista Business. I inserted the CD, followed the instructions and proceeded to install. After the BIOS was updated it took me to a screen where it said installation files were being copied; it was not actually installing Vista yet. Every time, at the exact same place, I received an error message that read "an unknown error has occured while searching for an unnamed file." The title bar read, "irsetup." I reset the BIOS to factory defaults and tried again but nothing changed. Every time I try, I get the same error message at the exact same place and the process does not go any farther. HELP!

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