Threatening emails

Hello Andrew,
We've replied to your original post and sent you an email.
Please check for the email and revert to us.
Please try to keep the whole conversation in one thread to speed up the resolution.
Thank you for your understanding.

Despite the reassurance of my AVG protection which tells me that there are 'no malware threats' and 'my personal data cannot be spied on', I have received 2 threatening emails this week.   Each with a different fake address but both stating they have stolen my personal data and have installed trojan viruses on my PC.   They also contain the expected allegation that they will 'reveal my alleged adult web site visits' with the insinuation that I will be in worse trouble unless I pay up !    And don't bother to try and contact the authorities !    Can you offer any  advice please.

Hello Andrew,
We've replied to your original post and sent you an email.
Please check for the email and revert to us.
Please try to keep the whole conversation in one thread to speed up the resolution.
Thank you for your understanding.