Problem with internet connection

[Tomamazas]

It started about a week ago, most games which is sensitive to internet connection started not to load or if loaded get disconnected almost immediately, while internet pages loads more or less the same speed as normal, download speed seems normal too. I have 2 PC which connected with wired router, and both PC have same problem. I already tried connecting modem directly to PC and problem didn't disappeared. ISP say that nothing wrong at their end and can't find anything.
Any lead would be fine.

 

[TomTom111]

Well, try the easiest things first.

Perhaps try and obtain new IP from your router.
Use this method to do that...
http://www.wikihow.com/Refresh-Your-IP-Address-on-a-Windows-Computer

If there is still no result, do a speed test via speedtest.net and see if the result is close to your rated speed from your ISP.

 

[Tomamazas]

Thank you for answering.

that method didn't changed my IP and speed matches what it should

 

[Tomamazas]

During weekend noticed that this weird internet goes from around midday to midnight, and after midnight it "fixes" and works without any problems until midday. It goes same way for 2 days, couldn't check it during workdays because of work.
Does that mean it problem on ISP side?