if they did not give a credit card and did not receive the file, there should not be a significant reason for concern. I would have them run virus scan and malware detection and remove anything found.

in the US, the Federal Trade Commission put together a non-techie page about these types of scans an you might direct your friend there just for some further knowledge.

it never hurts to be over protective if you think anything might have occurred. it is all about the level of comfort the person has after the fact that their computer data is still intact.

here is that link from the US FTC

If they did not give a credit card and did not receive the file, there should not be a significant reason for concern. I would have them run virus scan and malware detection and remove anything found.

In the US, the Federal Trade Commission put together a non-techie page about these types of scams. You might direct your friend there for some further knowledge.

It never hurts to be over protective if you think anything might have occurred. It is all about the level of comfort the person has after the fact that their computer data is still intact.

here is that link from the US FTC