here is the answer
http://www.fixya.com/support/t13938194-solution_toshiba_tvap_error_0x8146045b
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After installing Windows Ultimate, I attempt to install Toshiba Value Added Package that the FN button will work but I got an error message: Setup TVAP error. [0x80C7013D]. Please help me fixing this problem. Thanks and God bless.
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I couldn't install the Toshiba Value Added pack in Windows 7 either - I just gave up.
I can't find any mention of that error message, 0x80C7013D.
I suggest you contact Toshiba for installation of their Value Added Package.
Thanks