Following is a link to stack trace:

https://drive.google.com/file/d/0B75-pKcpEKs-SzhnREFTX3Y3eUU/view?usp=sharing

do you get the same issue if you exclude the profile folders from an access scanning by your anti virus?

The stack trace is fairly clear Thunderbird is waiting for something to complete.

Given you mention deletion it sounds like the anti virus and Thunderbird may well be having contention issues with files.

Hi Matt.

I don't have AntiVirus installed. And I see neither I/O or CPU activity.

IMHO stack is not accurate. Do you inject your code into GetFileAttributesEx? I guess no.

Could you please send *.PDB (debug files) files for *.dll and *.exe files?

Looking forward to hearing from you Dima

Following is link to Minidump file:

https://drive.google.com/file/d/0B75-pKcpEKs-SWR5RVdGLWVkVnM/view?usp=sharing UPD: Sorry... I cannot share this file as it contains password.