The reason I thought it may not have been a hardware issue was the fact that the light would still be on and my clicks/movement would still register after the freeze.
Anyways, thank you all for your helpful responses, I'll go ahead and call Logitech support.

I've had the G400 for about a month now and it randomly freezes up for 1-2 seconds in-game.
During the freeze, if I click or move the mouse, it will perform the action right after the freeze.
The optical light is also still on when this happens and I don't hear a connect/disconnect sound from Windows.
I've done some searches on this and it seems like some other people have experienced it as well, but I haven't seen any concrete solutions. Does anyone know what's going on?

Got deferred from both colleges I applied to early. For those high school seniors, congratulations if you got in already! And for those of us still working on apps, good luck.

Good personalities, will improve a lot over the season, and the medic has a pretty cool accent.

I like to use shotgun more often than gunboats because in instances where a scout has slightly higher ground it's pretty hard to hit them with just rockets, but ultimately both are viable options.

I just want to commend the coaches yesterday (at least the ones I played with). Absolutely great attitude, stayed after in mumble to give a review for each individual player, fantastic advice, pretty much did everything right. Keep up the great work!

Fun personality

Griffulz is extremely nice and an awesome player too!

There's also one on Tetris if anyone is interested.

http://www.landoverbaptist.net/showthread.php?t=85018

Great attitude, nice person, and good at multiple classes, good luck!

Drunk Girls have been together for a long time now and have a really strong core, I'm keeping my eyes on them.

My boy's turned into a man

Played a lot of pugs with him, definitely knows what he's doing.

Awesome dm

Played with him a couple times, could tell instantly just from speccing too that he had very solid dm