why is this thing happening?

[jojojassm0]

i was playing bo2 zm and my game just froze for a moment and i got to the desktop and the lansher log type this r_aaSamples will be changed upon restarting.
r_fullscreen will be changed upon restarting.
r_mode will be changed upon restarting.
r_monitor will be changed upon restarting.
r_texFilterQuality will be changed upon restarting.
ai_corpseCount is cheat protected
r_aaSamples will be changed upon restarting.
r_fullscreen will be changed upon restarting.
r_mode will be changed upon restarting.
r_monitor will be changed upon restarting.
r_texFilterQuality will be changed upon restarting.
Writing stats...
Writing stats...
Writing stats...
Hitch warning: 2100 msec frame time on main thread
Hitch warning: 1483 msec frame time on main thread
Plutonium r5126 >

but i can hear the game still running can any one help me