I have just bought a new computer (specs in signature) in December and I have been experiencing this problem ever since I installed WoW on this PC.
While playing WoW, it will sometimes lock up for 5-8 seconds and then kinda fastforward the game to where it should be. Sometimes I'll be missing half my life when it decides to unlock.
I never had this problem before with my old PC and it was a PoS.
Is there a setting that needs to be fixed or what?