Demon's Souls [BLES00932]

Hello, I don't know how to describe it, but I have a weird vibrating graphical glitch in the game. It began a bit after touching the Archstone in the tutorial, but not immediately after it. It was like this:

http://i.imgur.com/3tt9l6C.jpg
http://i.imgur.com/ftv5tUY.jpg

I have attached my log file. Thanks for your help.

I started a new game and skipped the tutorial, this bug was not occured in the first area after the nexus, but I had another problem too, the screen has frozen and I read the following error report in the log: F {PPU[0x1000000] Thread (main_thread) [0x00a6651c]} MEM: Access violation writing location 0x1400bfb7

Maybe graphics driver bug. What graphics card do you have?

Probably missing files, or files in the wrong location. Screenshot what is next to the folder PS3_GAME, what is inside it, and what is inside the folder USRDIR.

Ok i attached the screenshot.

Eveytime i boot it i get this message:
E LDR: Invalid disc directory for the disc game BLES00932
S LDR: (S)ELF: boot done.

I suggest showing file name extensions in explorer. The file PS3_DISC.SFB is PS3_DISC.SFB.txt in your case. Rename it to only PS3_DISC.SFB.

I have GTX 970 and just installed the latest driver, but it's still the same. My CPU is i7 4790K btw.