In general, these can be caused indeed by old drivers and weird software. Try it without anything else running. The drivers to update are 1) video card drivers; 2) sound card drivers; 3) motherboard drivers. All the rest are not really important. You can usually find these on the manufacturer's homepage. Feel free to post that inernat.exe - I'll take a look and see whether it's something bad. Actually, post your system info, as well. Do start->run->msinfo32 and then use the file->save option and attach the file here. There is a list of running programs in there, as well - maybe I can spot something suspicious. I need some clarification on this: How do you notice it? What kind of lag?