Hello Akihiko,
A Pentium 4 running 32-bit XP SP3 should be ok in theory. (I'm not sure what the absolute minimum screen resolution the installer can handle is, but I expect it can manage 800x600, so I doubt that's the problem. 1024x768 should definitely be sufficient.)
As background: the installer-authoring application that we use for Hauptwerk's installer uses Java, and during installation the installer will save temporary files and shortcuts relative to where the Windows temporary folder and Windows user account's home folder/desktop reside on the hard-drive.
I fond this this page on the Internet (for another application that uses the same installer-authoring software that we do for Hauptwerk), which suggests that the error can arise if the Windows username and/or Windows temporary folder (which might be within the Windows account's home folder, and thus be dependent on the Windows username anyway) contain 'unusual' characters:
http://www.maplesoft.com/support/faqs/detail.aspx?sid=32607I'm not sure exactly what counts as an 'unusual' character (i.e. what character sets Java and/or the installer software can handle properly), but my guess is that it's likely to be the issue in this case, since I understand you're from Japan. Perhaps it can't handle Japanese characters in the Windows account name properly.
Please ask your friend to try installing Hauptwerk under a different Windows account that uses just ANSI (American) characters in it and that has Windows administrator privileges, for good measure. E.g. create a new Windows user account named something like 'Hauptwerk', assigning it administrator privileges, then log in using that account and install (and subsequently use) Hauptwerk under that new account.
If that doesn't solve it, please also try changing the TEMP and TMP Windows environment variables to point to a folder that has only ANSI characters in its name/path.
Hopefully that will fix it.
Best regards, Martin.
Hauptwerk software designer/developer, Milan Digital Audio.