Since I have an MSDN subscription I downloaded Windows 7 Ultimate 64-bit this past week. I installed it on my laptop and then began installing applications. When I went to install Office 2007 Pro Plus it would start and then hang looking for ProPlsWW.cab. I attempted the install at least 10 times. I tried copying the install from the CD to my hard disk, I tried moving PropPlsWW.cab to another location, I tried screaming and yelling at it to “Work you piece of junk!”, but to no avail. I did look it up on the internet (I am currently using Bing Vs. Google). The most promising link I found was to delete the 11.0 or 12.0 registry entry under HKLM\Software\Microsoft\Office. I did try this and it didn’t work.
I finally unpacked the cab file and saw that the files in it seemed to relate to MS Access. I re-attempted the install, but this time I did not include Access and I went through all the tools installed and deleted any that referred to Access. I did not write down what I found because I wasn’t planning to blog about it, and not planning on re-installing again!. Finally at this point Office installed successfully. I then re-ran setup, added Access, and viola, install complete.