Internet explorer error

Hi guys..
I am using HP-COMPAQ NX6325 notebook
Configuration:
AMD TURION 64 X2 MOBILE TECHNOLOGY TL-50
1GB RAM
MICROSOFT WINDOWS XP PROFESSIONAL -SP2
100 gb hard disk
Norton Internet Security 2006
ATI RADEON Graphics card

I have faced the following error with IE

DDE SERVER WINDOW:iexplorer.exe- Application error
The instruction at "0x0788454d" referenced memory at "0x0788454d". The memory could not be read.
Click on OK to terminate program



I would also like to know what is CCAPP.EXE

I find all posts really informative and useful.
Well, all techies keep up the good work.