Não cosigo instalar o IRPF 2015 no windows 7

[ElizabethRib]

Alguém poderia me ajudar? Não consigo instalar o IRPF 2015 no Windows 7, já desativei o anti-vírus(ESET SMART SECURITY 8), instalei a versão mais recente do java e nada resolve, aparece uma enorme mensagem de erro:

Error in action CheckForPreviousInstall

can't read "tmp(Dir)": no such element in array

    while executing

"list $mtime $id $tmp(Dir)"

    (procedure "::InstallAPI::ReadInstallInfo" line 39)

    invoked from within

"::InstallAPI::ReadInstallInfo -prefix PreviousInstall  -array PreviousInstallInfo"

    (procedure "::InstallJammer::ReadPreviousInstall" line 9)

    invoked from within

"::InstallJammer::ReadPreviousInstall"

    (procedure "::InstallJammer::actions::CheckForPreviousInstall" line 2)

    invoked from within

"::InstallJammer::actions::$component $this"

Error in action CheckForPreviousInstall

can't read "tmp(Dir)": no such element in array

    while executing

"list $mtime $id $tmp(Dir)"

    (procedure "::InstallAPI::ReadInstallInfo" line 39)

    invoked from within

"::InstallAPI::ReadInstallInfo -prefix PreviousInstall  -array PreviousInstallInfo"

    (procedure "::InstallJammer::ReadPreviousInstall" line 9)

    invoked from within

"::InstallJammer::ReadPreviousInstall"

    (procedure "::InstallJammer::actions::CheckForPreviousInstall" line 2)

    invoked from within

"::InstallJammer::actions::$component $this"

    while executing

"$obj execute"

    (procedure "::InstallJammer::ExecuteActions" line 69)

    invoked from within

"::InstallJammer::ExecuteActions $id -when $when"

    (procedure "::InstallJammer::NextCommand" line 8)

    invoked from within

"::InstallJammer::NextCommand .wizard 5C5B9375-5DCF-DF7A-079C-9042A8BEA143"

    ("uplevel" body line 1)

    invoked from within

"uplevel #0 [string map $map $command]"

    (procedure "_eval_command" line 22)

    invoked from within

"_eval_command $path $cmd"

    (procedure "Wizard::next" line 9)

    invoked from within