Ping spiking

Hai dudes.

Nowadays I'm experiencing a high raise of my ping from ~151 to ~250. I would like to know if someone can help me solving this problem.

- I have a Wireless 12MB connection.
- My modem is a D-Link.
- I live in an apartment.
- I don't have any torrents/emules/limewires on.
- My game has been downloaded yesterday.
- I have formated my PC yesterday.
- I live in Portugal.

Note: I already used Wireless and the D-Link modem when I had ~151 ping.

Note #2: Please adult posts, ktnx.

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