When installing vWorkspace, the Installer fails with Error 1330. A file that is required cannot be installed because the cabinet file E:\vworkspace71\...\Always~1.cab has an invalid digital signature. This may indicate that the cabinet file is corrupt. Errir 270 was returned by WinVerifyTrust.
The Server is configured to check Certificate Revocation Lists. However, it is not on the Internet so cannot perform this check.
Open Internet Explorer and configure a Proxy Server so that the machine can perform the CRL check.