hello to everybody at avsim i'm also having a problem with ctds and fatal errors with no other programs running except norton antivirus and here is my computor spects,cpu amdfx 6120-six-core processer/cpu speed:350 Ghs/1 cpu/number of cores:3(6)(hyperThread enabled)/mother board:2ac8/ram memory:9.77GB/GPUmemory is 1,024.00MB/GPU's installed 1/primary GPU : AMD Radeon 7450/Score rate is :14700,also my frps are crapy when the addon aircraft is on the ground but when airborn frps are ok,now i don't know about computor or fsx reconfig or anything like that but can someone tell me a newbie the easiest way to fix this thanks. tony