Upgrade Acrobat X standard to X pro get error 1334 "convertxf.exe" not found on install

Have operational Acrobate X Standard software already on my PC using Windows XP

upgraded to Acrobate X Pro, dowloaded with no problems, During install encountered the following error:

Error 1334. The file

"convertxf.exe, 715C03BA_A57B_4264_80D9_38D98029F5A7"

cannot be installed because the files cannot be found in cabinet file

'Data 1.cab'. This could indicate a network error, an error reading

from the CD-ROM, or a problem with this package.

The Data 1. Cab file look to me to be orignally down loaded with the Acrobate X standard. I have re-downloaded Acrobate X standard and re-installed I still have the same problem. I have also re-down loaded and re-installed Acrobate X Pro, same problem.

Any suggenstions?