Error 1305 . Error Reading From File /Adobe Acrobat XI / Data/A1.Cab.

This is a continuation of my problem in loading Acrobat 11 onto my machine with Windows XP  Professional x64 Edition Version 2003 Service Pack 2.

I have added the requested additiional upgrade, but now can only get to this error message.

Error 1305 . Error Reading From File /Adobe Acrobat XI / Data/A1.Cab. Verify that the file exists and that you can access it.

I searcched the disc and could not find a file by that name on the CD, but I am assuming the search is inconclusive and that it is on the CD.

I removed AntiVir , as it is very aggressive. I still have Malware, which always stays unopened until requested, and Spybot, which does the same.

The machine is not onine. I use it for my writing and photo work offline.

Help would be appreciated in finally getting this product, which I recently purchased NIB.