Hi Larry,
I'm assuming you're using Start=>Run to enter the command?
Ssuming there aren't any typos and the folder you're extracting to exists, my first guess would be that the download is damaged or
incomplete.
Be sure you've shut down all apps, utilities/antivirus before running the command. Also you may want to use Start=>Run %temp%
to see if there is a setup .log file created with more details.
The download should be 451,056 KB (461,881,224)
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This is all i get wihen i double click on the file i downloaed from
Microsoft. I tried the extrect command with no luck..
"c:\downloads\OPPLUS-EN.EXE" /extract:"C:\Off2007ProB2CD1" >>
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I hope this helped you,
Bob Buckland ?

MS Office system products MVP
LINKS to the 2007 Office System Beta
1. Free MS Office 2007 book from MS Press, 213 pages:
http://microsoft.com/learning/office2007/default.mspx#booksfrommspress
2.. Office 2007 Beta 2 Online Test Drive, Downloadable beta,
e-learning courses, doucmentation and movies:
http://microsoft.com/office/preview
3. Try the 2007 OfficeOnline preview website , without Office2007
a. Install the ActiveX access control
http://office.microsoft.com/search/redir.aspx?AssetID=XT101650581033
b. then visit
http://officebeta.iponet.net