beams in the screen

Hello Warmane community,

Since a few weeks now i am having problems with my wotlk client, i downloaded it from the warmane website.
A few times a day i am seeing light flashes and beams in the screen ( not every time, but a few times a day ), not only ingame but allso when i log in at the password screen.
I downloaded the client again, i threw out the cache folder and wtf, i resseted all my settings, i played around with the monitor refresh rate ( 60-75 rate )
I am playing the game with the video settings on low. My internet connection is stable, and when i am playing the retail version of wow i,m having no problems, only the 3.3.5a version, below i have added a screenshot, i hope someone has the answer because at the moment the game is no fun anymore.
By the way, the problems started right about the time i went from windows 8.1------> windows 10, dunno if that has got something to do with it. all my drivers are up to date.

http://i.imgur.com/nluGmm8.jpg

Thank you all
Nyxalar

if you always got "Wotlk" from here: https://www.warmane.com/download then now try "Wotlk (old)"

thnx for the answer Skullbashat,

I downloaded both versions and it seems that i have the same problems with both versions.
Half an hour ago i logged in after a long time on a 2.4.3 client and in that game i had the beams too :(, so i think it has got something to do with my computer.
My computer is 1 year old, and the only thing i recently changed is windows 8 to windows 10.

Yeah update your graphics drivers and stuff probably.

Hey guys, i found the solution finally and i want to post it here so other people may benefit from it that have the same problem.

It was a combination of my video driver not updated and having multiple pages open in my webbrowser.
I have updated the driver and closed the webpages, seems to work out just fine for me.

Scarissa