My computer keeps disconnecting and reconnecting to the internet any help ??

[Jake]

Alright so basically my computer has been always disconnecting and reconnecting to the internet, it's really frustrating and also a yellow exclamation mark pops up in the bottom right corner. When I am connected it says I'm connected to the network but not the internet even though I was on the internet, I'm usually good with computers but this is a problem I can't solve also it's not my router because no other devices get this problem just my computer. Thanks for reading this long story xD
I also run Windows 7 starter.