Lag Issue v81

Hello

So here's the deal : I don't have any lag problems at all while I'm playing League of Legends or World of Warcraft. The moment I play ET however I start lagging out every 5-10 seconds for half a second, sometimes even longer.

The lags are only there when I play with SLAC though, without it I have a perfect 48 ms on every server.

Does anyone have any idea why SLAC gives me these lag boosts, while it didn't use to do that up until, let's say, last week?

Thanks in advance