Core 2 Duo on Dell runnign Network Apps

I need some help and am hoping that you all can point me in the right direction.

We have migrated to the new Dell D620 and D820 laptops. Since we have gone to these we have nothing but issues with network based applications. In a nutshell if we run a network based app it will BSOD immediately upon execution.

We know the apps are fine as we can run these exact same apps with no issue on the D610 and D810.

We have rebuilt these PC’s from scratch, ensured that all the latest drivers have been installed and are running the latest version of Client32.

Any suggestions would be appreciated.

Thanks

Shawn