Win 7 upgrade from 7048 to 7057 problems

#1
Actually, I had this problem with 7000 and 7022 as well.
  • Insert DVD
  • Launch setup.exe from within Win7 7048
  • Click "Install Now"
Almost immediately I get:
"Windows Setup cannot find a location to store temporary installation files. To install Windows, make sure that a partition on your boot disk has at least 688 megabytes (MB) of free space.

Error code: 0x80070490"

I've done a full day of searching for more info online and really haven't found anything that relates to Win7. I have done the following:
Verify available space on C: (which is over 400GB free)
Checked permissions and ownership on temp folders (although it was never changed from the initial install)
Launch setup.exe as Administrator

The install will work if I boot from DVD but will not perform an upgrade, of course. However, a full install is possible to the same or secondary hard drive.

Any ideas are welcome.
 


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