I have been using Kaspersky internet security for over 5 years now. My new self build i7 pc has had it on for coming up to a year & have had no problems with it.
One of the things i like about it is that its very easy to disable when you want to do music\DAW stuff on the pc.
I have a shortcut placed on the taskbar for the network connections with the "F7" key assigned to the shortcut to make it easy to disable. So when i want to use my pc as a DAW, i just hit the shortcut key & disable the network connections & then disable Kaspersky with one mouse click.
Do you find it makes any difference?