I recently upgraded my ZoneAlarm Pro to version 10.0.250.0 (latest version as of this date). Since then I've periodically had problems with slow Internet access.
Various web-based speed test tools will show that my download speed is 1-2 Mbps instead of my usual 8-10 Mbps. If I shutdown ZoneAlarm, my download speed will immediately go back up to normal. Things will be OK for some number of days, and then I'll notice slow Internet performance again.
Anyone else seeing this? Thanks in advance.