I got this error today when launching my Arma I though I would write up my fix.
Not My Screenshot one off the internet but of the same error message.
A quick restart will fix this an Arma will launch fine after.
After doing a quick google I have found out that this is due to corrupt windows files.
A near full C Drive will also cause this issue.
I would recommend that if you get these error message you make arrangements to reinstall your Windows at the nearest opportunity
More reading: http://www.wiki-errors.com/wiki/0x0000dead.php
Don't download the repair tool it is bloatware.