Hi, germanaagun. I have exactly the same problem, just by searching "arma 2 stuck every seconds" at google and found this thread. So, im cool at resolving problems (like wolf, from pulp fiction), and lets see what we have. First - i dont have this mod. Second - Me too runing A2CO:BAF:PMC. Mods are used to run: @401;@ace;@acex;@acex_ru;@acex_sm;@acex_usnavy;@acre;@cba;@cba_a2;@cba_oa;@cwr2;@jayarma2lib;@utg;@utg-islands;expansion;x\caa1;x\oac\oac_core; Specs of my dell studio XPS notebook are (Please check if you have same BIOS and version, same Wifi Intel Link 5300 AGN (its really important), same processor i7 and sure the Video Card - Radeon: (you can download AIDA64 to check that) Next is BIOS setup. Do you have Hyperthreading active? (I have, and i know that may cause problems in performance, but i dont have an option to disable it in notebook's BIOS. Also there's some options in BIOS called Virtualization and Intel SpeedStep - enabled/disabled? Arma startup parameters: i have: nosplash, world-empty and cpu-count-4 (this is not exthreads parameter) Arma 2 graphic options: Every setup i tried - same results. Sometimes its work stable and sometimes its stuck every 5 seconds. Memory, textures, AA is always off, Anisotrope and vsynch is really no matter - got the same lags. P.S. - except for that lag, my fps is always around ~60. And every 5 seconds it becomes extremely low and back to 60fps again. What comes next? :P (fear and loathing in l.a.)