I purchased a copy of Trados 2019 Freelancer version last November and it has been working well since then till today. In recent two days, the upgrade message reminds me that SR1 upgrade is ready and available. So today I click the button of upgrade. But after the upgrade programe removes the older version and restarts the machine, it always stops at the step before installing SR1, and again and again requests the restart of the machine. But after each time of restart, it will again stops at this point and requests restart the machine again. It will not proceed to the stage of installing SR1. How can I solve this problem?