PC freezing

It receive a message saying “it may take a while” when sending an email, also ,when I delete a message, it sometimes freezes my pc.
I have a new deskitop & am running Windows 10. Can anyone help?

Hello Stan,
what version of eM Client are you currently running? Is it the latest RC version 7? found on our blog?
Are you perhaps sending or deleting a message with large attachments?