Having this issue with my PC. Never had any issues before, it's suddenly happening out of the blue ( I read about fixes on how to geek - didn't work since I can't add a 64bit dllhost.exe via DEP ) so I'm asking here for alternative fixes. I have VLC, PS CS5, k-lite codec pack, however these things never affected my preview of photos before so I feel they are ruled out IMO. I don't want to turn off thumb preview btw. So anyway, anyone can assist with helping me fix this issue? Much assistant would be helpful!