02PATHFINDER

my pathfinder wen i start it sometimes hesitates for 2-3 seconds before it finally kicks in and starts up, it sounds like its trying to crank during those 2-3 seconds but this only happens 4 out of 10 times , my warranty is going to expire in 15 days and the stupid nissan service guys said they cant find nothing wrong with car, i think they just saying that to make me wait till it gets worse n loose out on my warranty , i just bought the truck n dont know bout its past history, bought it from a nissan dealer , now it has 40k please if anyone could help me out i would appreciate it , thanks sal

the two front windows roll up and down very slow,at first i thought i may have been the battery , but everything else works fine and the back windows roll up and down real fast compared to the front one , im not sure what to do or what it is , i just dont think its normal the way it goes up or down, if anyone has any suggestions on what it is please let me know, ty