I have made a new installation of QC 10 starter edition in a pc. So physically they are all in one PC with database(SQL Server), webserver JBoss and the QC Client.
Using IE 7, when logging on to Site Admin it goes in fine. But when Trying to log on to Quality Centre it gives the following message.

/qcbin/install/test_type.cab This file didn't pass signature checking.

I have checked all the test_type.cab files on the pc and there are 4(2 in the initial download folder and 2 in the program file) they all have digital signature of HP.

Can any one please help