Sorry about that: Indeed, I simply clicked on the Download button, without noticing that the Comodo installer comes in 32- and 64-bit versions, the former being the default. The 64-bit version installed OK.
No need to be sorry, we are glad to help. Enjoy
If browsers use HTTP headers to return which OS/version the user has, the Comodo website could pre-select the right installer.
Thats a great idea . Kind regards