V4 is really old and does not provide sufficient protection against current threats so upgrading to v8+ is a must. As of v5, we started using a driver that takes advantage of Windows Filtering Platform instead of old tdi drivers not officially supported / recommended to use by Microsoft. If you are having an issue with the Epfwwfpr driver, it could be a clash with another driver utilizing WFP or a missing patch for WFP. For all known WFP issues Microsoft has provided a hotfix.
I'd strongly recommend contacting ESET Customer Care to troubleshoot the issue as staying with v4 is really not a solution.
Ok, I understand, but this happens with Windows XP 32bit and 7 (32 bit and 64 bit) with all MS patches installed with Intel network drivers in Lenovo and Dell machines. It's a problem that will force us to stop using NOD32 if it isn't solved. I will try contacting customer care.