Boot from a Linux Live disk (free to download and burn) to see if that's as fast as it should be.
If slow: it's a hardware issue.
If fast: it's a Windows issue. First try another Windows account, then system restore as far as you can go back, then a clean reinstall of Windows..
So I wasn't quite sure where to put this so I'll try it here,
Recentl my gaming computer has become ridiculously slow with any internet related services, games constantly disconnecting, skype disconnecting, hell sometimes I can't even load websites when this happens and it is a constant problem at the moment and can barely load google.
I know its not my internet as my other devices have no problems laptop ect but I have noticed they start to lag a tiny bit (barely noticeable) but as soon as my gaming pc turns off everything goes back to normal. I have scanned everything with Norton 360 (which I have had since day one and never disabled) and even went to the hassle of getting malwarebytes just to double check it was safe. When i do speed test with my pc I'm getting 1mbs on other devices I am receiving 25+.
I have a Asus pce n15+ network adapter which could be a problem?
I've tried uninstalling and re installing drivers updating them ect. still no solution and now I'm lost.
Can anyone offer me any ideas of what to do thanks!?