I get the following in my security event log right before BSODs, which happen frequently at random times:

"Code Integrity determined that the page hashes of an image file are not valid. The file could be improperly signed without page hashes or corrupt due to unauthorized modification. The invalid hashes could indicate a potential disk device error.

File Name: \Device\HarddiskVolume2\Program Files\CheckPoint\ZAForceField\Plugins\ISWSHEX.dll"

Here is my system information:
Manufacturer; HP
Model: HP Pavilion dm4 Notebook PC
Processor: Intel Core i5 CPU M450 @ 2.4 GHz
Installed memory: 4 GB (3.8 usable)
system type: 64-bit OS

Thanks for any advice. For now I have uninstalled ZA free firewall but I'd like to be able to use it