Done:
HD Tune Pro: WDC WD6400AAKS-22A7B Error Scan
Scanned data : 639 gB
Damaged Blocks : 0.0 %
Elapsed Time : 2:06:03
Well, that is excluded, now gonna restart my PC to check whether my CD/DVD player is working.
---UPDATE: plugging my cd/dvd-rom player into a different port did not work. But if i got to get just one problem fixed, this was on the bottom of my list:P.
I will be going to sleep now, as i live in EU regions, and it is 3 am here. ---
Small sum up of errors, in order of annoyance:
WoW crashes EVERY time i click on the Login button, together with my entire computer, no error messages, just stopping to respond to EVERYTHING.
Computer hangs in the very first screen i see when i start my computer for 30 seconds (20% of the time), 5 minutes (30% of the time) or doesn't ever get out of it (40% of the time) instead of just showing it for 3 seconds and moving on (10% of the time) which should be happening.
Computer hangs while the windows loading bar with blibs from left to right, somewhere blibs hang, and my system is stuck for like 60 seconds (ALWAYS happens if i start my computer).
My CD/DVD-rom drive is not found by my windows AT ALL, not even showing a message of unidentified object connected, but it does open and close
NO HDD errors. NO drivers out of date. NO CPU overheating. NO restoring to dates when it worked reverted the problem at all. NO network having anything to do with this. NO reinstalling WoW resolves the WoW related problem.