Some terrible ****

Hello to all future readers of this topic ! To begin with that I don't know if this is the right place for this,neither the structure of the report should be on this way,but the reason for the issue is the most important for me. That's why i don't want to hide my character's name,guild,bars,party members,etc,because it's not the main idea.So let's talk about the theme : Recently i was evident of one very weird bug ( if i can say it ) for me,which i came across for the first time of my 4-5 years old playing time :D . One day as I was playing,something unusual happened : some of the objects in-game suddenly dissapeared (like tree,rocks,houses,etc) and the mobs as well.But as i was going through not only didn't get better,but even worse.Some seconds later my spellbars,my character icon also dissapeared and in some cases even my character itself.I only see something like an empty screen.Even the screen dissapear itself somethimes. I got these photos from my phone,because I am not able to do with Print Screen,while everything is so chaotic.I don't know what might cause this,but i got this problem every day and as i am doing quests everything goes shaky and disrupts my work. (I can't see the targets,nor myself) I tried with deleting Cache,WTF, ; Try to download the game again ; try to restart the computer many times,but when i log after the restart i go with picture Number 3 (http://s2.postimg.org/wkay47vq1/2015...2.jpg).I'd be very happy if you can tell me the reason and any possible solution to this situation,because i can't play otherwise :)

http://s4.postimg.org/ddb70ay8t/20151020_092957.jpg

http://s1.postimg.org/sv78qzbzj/20151020_111206.jpg

http://s2.postimg.org/wkay47vq1/20151020_233502.jpg

http://s29.postimg.org/fm4da4k07/20151019_113442.jpg

I'd guess a memory issue. If you're on windows, run a memory diagnostic test.

Are your DIMM on mismatched frequencies or memory capacities?

Have you tried disabling any add-ons that you may be using?

Are you using any action bar add-ons or frame editors (dhud for example)?

I had a bad experience with dhud once, made the screen go pretty much blank apart from the scenery every time I logged in.

It must be the GearScore addon. I always knew it would eat WoW alive, just not quite like this.

EDIT: Sorry - I had to D:

Sorry,but I am not using any addons .And sinnedangel can you be more specific on what should i do :D

something sort of similar happened to me some time ago on my old failing HDD... my UI frames would suddenly vanish as if their opacity was turned down to 0, frames, background and all, turned out to be a nasty badsector where the game keeps the UI... so run a defrag too just in case