I have a Windows 7 machine here that is constantly losing connection to the internet. The weird thing is that all local network shares are fine during these outages. I'm not having any internet issues on any other computers here, so it is not our internet connection. Some things I have tried:
Checked that the only A/V running is MSE (MS Security Essentials).
Disabled the ethernet card and switched to WiFi on the computer. Problem is still the exact same.
Pinged this machine from another in the office for 24+ hours with only a couple packets that were lost.
Ran HiJackThis and the log showed nothing out of the ordinary
Ran Malwarebyte's Antimalware a couple of times and that found nothing.
The user has had this problem for a few weeks but I was only recently told about it. I looked at the history in MSE and it found "PWS:Win32/Zbot" on Oct 1. The user said that's probably about when it started. MSE said it cleaned it, but I'm wondering if maybe it didn't or it installed something else that wasn't found.
Anyone have any idea what might be going on?