If you're getting "VAC Was Unable to Verify your Game Session" make sure in CASUAL (also, deathmatch, wargames, etc. e.g. not comp) you aren't doing anything unrealistic that a player cannot do without a cheat. If in casual you're able to do instant 360 headshots against 5 enemies at once, you're going to get flagged. Because casual modes don't have overwatch review you're going to receive a kick for acting in a way that exceeds human capacity. Keep it legit and you won't get kicked for a failure to VAC connections. Thats also not the only possible way to receive this error, if you receive it attempt to fix it using the variety of methods people suggest, don't blame the cheat first.
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