Thunderbird lockdown ?


Today i installed Comodo Internet Security.
i come across an problem with Dekaron, but i fixed that, disabled defense+ .

Later i Got a warning with my Thunderbird Email program.
Something about Shellcode Injection, not sure what this means.
the program was on for hours np but then this came.
could it be the addons i installed in thunderbird ?

i use webmail and webmail- hotmail.

can someone tell me what happend ?