I tried the installation again, and this time there were no issues. Solus Budgie has been installed on the 12-year-old Vaio notebook PC, on which I have been running Solus for more than five years. It is working fine, except for one issue: I can't access the Solus website (all other websites are accessible). I am typing this post on a Windows machine. Will post this issue under a different header. Thanks to all of you for your suggestions and comments.