Check out this KB article: http://support.microsoft.com/kb/938810


HTH,
JP

On Dec 13, 5:50 am, Verushka
wrote:
Yesterday I installed Office 2003 Service Pack 3 (SP3)..so today I`m trying
to opne WKS file with excel and I`m getting this message: You are trying to
open a file type that is blocked by your registry policy.

Does anyone has a clue?

Thanks