Graphics issues?

[stabbedbyapanda]

not sure whats theses are called not very good or knowledgeable when it comes to video cards

Desktop-Windows 7 Home premium- 64bit

so when i hit esc there is the line right there also when moving in that same spot it bugs out a little bit, not to noticeable

then i came to the door made weird sound then poof it looked like that

about 5mins before i got to the door i was in a room where u find the lantern and on the left wall when entering the room behind the first bookcase there was light shining from behind it, at first i thought it was to show a secret door was behind it but after looking/leaning to see behind it nothing was there and then i found the little fire place later on so light was shining through the wall into that room (also did not have a screenshot at the time bci thought it was one time issue tried to go back to it but the door was locked :/)

not sure if all this is related but i figured 3 issues like this within 30mins of the game, that i would prob run into more so i would like to fix this now