0xc0000043, a problem with Panda Cloud Antivirus or Firefox itself?

[swejuggalo]

I've had this error message on several computers with different OS.
One thing in common is Panda Cloud Antivirus. I do not know what this
error message stands.
If Panda Cloud Antivirus somehow delays something when starting
Firefox should not Firefox wait instead of crashing?
What do you think? Does Firefox has a problem with Panda Cloud
Antivirus or the opposite?

[Chris Ilias]

Does the Mozilla Crash Reporter come up? If so, open Firefox, go to the
address "about:crashes" (without the quotes) and tell us your latest
crash IDs. We can then look at the data specific to your crash and have
a better idea of what is causing the problem.

--
Chris Ilias <http://ilias.ca>
List-owner: support-firefox, support-thunderbird, test-multimedia

[swejuggalo]

No. Nothing happens besides a small window where I can press OK, and
then try to start Firefox again.

One theory is that Panda Cloud Antivirus holds on to a file a bit too
long (on access scanning) for Firefox to like it. How would Firefox
react if a file has delayed access due to a security software
demanding access first? Does it give a error message directly or does
it wait some extra time to gain access to all the files?

[gatocl.maipu]

Is any file of Fx compressed with UPX? i have this problem with an
antivirus and the mame32 games.