can't delete email

I’m sure you can imagine what a nightmare this is. I can sometimes delete one or two emails before my computer totally stops responding. I use Firefox and this problem began soon after they “upgraded” their email system. Can you help? I’m at 1493 emails and climbing!

I use Firefox and this problem began soon after they "upgraded" their email system.
you mean Thunderbird mail client?

attach (not copy and paste) OTL diagnostic log. http://forum.avast.com/index.php?topic=53253.0

then a log expert will have a look when they are online later today…

Here is the scan you asked for.

your Malwarebytes log say no action taken … after scan you need to make sure what is detected is marked for removal and click remove selected

then run and attach OTL diagnostic log…

I only saw 2 items
Files Detected: 2
C:\Users\Owner\Downloads\EmailNotifierSetup.exe (PUP.Optional.Inbox) → No action taken.
C:\Users\Owner\Downloads\Setup(5).exe (PUP.Optional.Conduit.A) → No action taken.
How do I delete them? Sorry to be so thick

You need to rerun the scan then “show results”… make sure the infections are ticked and then click “remove selected.”