I have Dell xps 15 laptop it have i core 5 processsor ,4gb ddr3 ram and 1gb nvidia gt 420 m Graphics i had no problem using sl viewer yet but with new update and changes in the windows in viewer when i click to switch between friends to chat the viewer locks up for few seconds it is not running smoothly the previous release was just very very fine i dont know what the problem is i love the new view but this locking up is not making me happy i dont want to switch to other viewer so if anyone having same problem or solution to this reply please!