ohh my goodness my head hurts can any1 help

ok so i have got it to work but there are a few issues 

1 when it starts downloading tiles i get a lot of miss and message's more that preloaded 

2 every now and then it courses fsx to crash 

3 i uninsulated to but not sure what setting to put in when am reinstalling below are my pc specs 

windows 8 

asus x55c series 

hdmi 750GB

intel core i5-3337u ,  1.8Ghz 

memory 6GB

internet download speed is 4.35mb

upload speed is 0.31mbps 

helllllllp 

meny thanks