Error code 0x80070241 during (clean) upgrade from Windows XP to Windows Vista

I purchased (a legal copy of) an upgrade from Windows XP (also legal) to Windows Vista Home Premium at Microsoft's webstore. However, during the installation, after about 6% copying files, I get the error message "Windows cannot copy files required for installation. The files may be corrupt or missing. Make sure all the files required for installation are available, and restart the installation. Error code: 0x80070241".
The problem is you can only get support from Microsoft after the activation of Vista, which is of course not possible if you don't get it installed. So, how to solve the problem?
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Alan HendersonRetired marine engineerCommented:
Copy the Vista DVD to the root of your c: drive:
d:\xcopy /e *.* c:\vistadvd
Or just use Windows Explorer to copy it.

Then run setup.exe from within that folder. That would eliminate the DVD drive as a culprit.

Could be a bad DVD.

Try doing a clean install of Vista. You can do this with an upgrade DVD.

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HoogendoornAuthor Commented:
I tried all the above. It did not work.
HoogendoornAuthor Commented:
I solved the problem by borrowing a DVD from somebody else and copied the boot.wim and install.wim file from that DVD. Very strange was that "compare files by content" in Total Commander reported that the downloaded install.wim and the install.wim from the DVD where identical. However, the installation worked with DVD-copied install.wim file and not with the downloaded install.wim file. Apparently the downloaded file is indeed corrupt, but "file compare by content" of Total Commander does not see the difference with the non-corruptive file from the DVD.
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Windows Vista

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