Please read the reply to the same question you asked yesterday.
Please do not multipost.

Mr. Low wrote:

Dear Sir,

After installing the Techical Refresh for MS Office 2007 (Beta), I saved a
blank spreadsheet and tried to reopen it. Surprisingly it failed.

The error message being the "file might have been infected by virus"

I have done a full system scan using Norton Antivirus 2006 and found no
virus was present.

I think this is a major problem for this Technical Refresh, I hope you could
study thouroughly the cause of this problem in order to prevent a potential
pitfall during actual launch.

Kind Regards

Low Seng KLuang
Malaysia