I have a problem here. Can anyone help me out.?

I cannot surf to the internet in our internet shop but i can play Online Games in my PC.
I can only surf to internet every morning for at least 1h+...
and Every night starting 9:30~~...
I already tried different browser but problem is still occurs...

Is this a some kind of Virus?.,
Or ISP problem?.

I have no idea. You haven't even said what PC you have or what ISP you use.
We are not mind readers, we can only work with the information that you give us.

Are you the administrator of the system?

Download Malwarebytes' Anti-Malware (http://www.majorgeeks.com/Malwarebyt...are_d5756.html) to your desktop.

* Double-click mbam-setup.exe and follow the prompts to install the program.
* At the end, be sure to checkmark the Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.
* If an update is found, it will download and install the latest version.
* Once the program has loaded, select Perform full scan, then click Scan.
* When the scan is complete, click OK, then Show Results to view the results.
* Be sure that everything is checked, and click Remove Selected.
* When completed, a log will open in Notepad.
* Post the log back here.

Make sure that you restart the computer.

Next download HJT from here - http://download.cnet.com/Trend-Micro-HijackThis/3000-8022_4-10227353.html and post a log from that too.

Thanks...Let me try this one...
I'll post later for the results...

The kind of problem you're describing sounds like some kind of restrictions set in the router configuration