it could be possible that the ocassional freezing and frameloss is not a network issue.Possible hardware or some background software that actively is running. Possible your AV keeps on constantly scanning or probing your AC. Must be a configuration on ur AV issue. try disabling heurestic scan.
Idk if im right or wrong but my suspiscion is that ur onboard intel card might have something to do bout the lag. If anyone is using same vidcard they can confirm things.