Lots of people posting on this and haven't seen one answer yet so here it goes again. Reaaaalllyyy would like something from red's as I have posted on 20 different threads getting the same thing. Always runs at 60fps, no lag, no problems. Viktor update (not when he was 'turned on' but when he was added in patch). Now usually 1-4 times a minute 60fps drops to 5-7 fps and locks up frozen for 1-3 seconds, then pops back to 60fps like nothing happened. Sounds glitch ("Welcome to Sum-sum-sum-sum-summoners rift"). It even locks up for 1-2 seconds in launcher/champion select. It is not on my end. Nothing has changed on my end, been installed etc. it does not happen on other apps or other games. But since it makes LoL mostly unplayable (or at least my scores bomb) and there hasn't been any "we're aware of this issue and working on it" i have spent my free time doing the following:

1. updating graphics drivers
2. updating network card
3. trying to play on game booster
4. trying to play on loowww settings
5. ending every background process
6. wired internet connection
7. updating/reinstalling Adobe Air (had hopes for this one)
8. run every malware, adware, virus scan, defrag, debug i can
9. uninstalling and reinstalling League of Legends
edit:
10. lowering priority/closing the client once the game has started
11. upping the priority of LoL once game has started
12. run game as administrator
13. ran SeaTools to make sure it wasn't a failing hard drive
edit:
14. doomsday device: completely obliterate and reformat my computer, installing ONLY league. no effect.

anything i could think of to try and fix this. all of this, of course, has no effect.
i have a hunch it might actually have to do with the sound files, don't know if there was a change in them or their location with the Viktor update but whatever happened i am royally screwed up now.

i am desperate. please help. at least a red saying they hear us and there is someone looking into this.

same here need help lol

yes just after the viktor come out
and im running on win7

before viktor patch i had a constant 60 fps. i play with all graphics turned to their lowest settings and i have updated my pc lately (i had to in order to get skyrim to work properly :/ )

after the viktor patch, ive gotten a lot of lag spikes during random times.

i really dont want to reinstall but i dont know what else to do... its pretty annoying.

don't bother reinstalling, as u can see above that is one of the many things i tried. it's on their end, and i'm hoping for a hotfix or something. unless there is some other client they can provide.

BUT as this makes league pretty much unplayable for me, and i refuse to give up on this game, i will post on this issue relentlessly until i get some help.

The issue is with the pvp.net client. It wont idle. The client is supposed to idle once you start loading the actual game, as of the Viktor update, the client wont idle. The only thing you can do on your end is to close the client or set it to a lower priority. This happened before on the patch that Taric was remade. Hopefully riot can hotfix it.

wow this is huge, this is the first potential lead i've heard so far! how does this work? can i shut it off? once the game starts like alt+tab out and close the client?

thank you thank you thank you

Okay well this sounds like another riot bug HOWEVER on the 21st Nvidia released a BETA 290.56 driver that may help fix the problem (by some random occurance) I figured I'd throw that out there to try to be helpful to anyone using a higher-end Nvidia card (probably lower end too.) If you're running borderless try going fullscreen as well, there are issues with that, too.

Poon, it is not your drivers, it has nothing to do with your computers hardware. I stated the issue before. The client dont give a **** about what drivers you are using, people with high end gaming comps that can run LoL at 120+FPS on max settings are dropping down to 10 FPS on minimum settings. It also has nothing to do with the game actually being in borderless mode. Go look at other threads about FPS problem, people have the latest drivers and are running it in full screen. Updating your drivers and anything else that the wrenchmen's toolbox thread says can help wont help.