Error 1330. A file that is required cannot be installed because the cabinet file C:\Program Files\Sage 100 ERP\...\Data1.cab has an invalid digital signature. This may indicate that the cabinet file is corrupt. Error 266 was returned by WinVerify Trust"" when trying to install
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Solution
The Root Certificates on the PC may not be the latest ones from Microsoft. Please download and run the Root Certificate Updater from Microsoft. It can be found at this link (check to see if there is a more recent version):
http://www.microsoft.com/download/en/details.aspx?id=6149
Setup required internet access. Without internet access (or a restrictive firewall or proxy), setup may fail to verify the signature because it cannot access the online certificate revocation list (CRL).
Some brief information on the root certificates:
This item updates the list of root certificates on your computer to the list that is accepted by Microsoft as part of the Microsoft Root Certificate Program.
If you want the details about Root Certificates, then try this link:
http://technet.microsoft.com/en-us/library/cc751157.aspx