I am working on a laptop and a desktop that are both having the same issues that started at the same time. These are both XP sp3 machines.
They both will not open IE or software update due to a DEP error. When I try to open IE I get a window that says "Data Execution Error" and the app fails to launch.
Firefox and Chrome run fine.
I have done a boot scan with Avast, run malwarebytes, spybot, Ccleaner, etc and they do not find anything wrong.
I used the advanced settings tab to reset IE to it factory settings and nothing. It will not open in add-ons off mode... I even re-installed IE8 and same issue.
The one thing that does pop up is a script blocker message from Avast when I first try to launch IE.