Since yesterday my connection is VERY slow while it is DSL and when I am trying to open a site my Opera says:

A page on the public Internet requests data from your private intranet. For security reasons, automatic access is blocked.

Only if I refresh it like 2 times it opens it.

And also, my computer randomly shuts down and then when I am trying to open it it doesn’t… Only after 10 minutes or so.
What could the problem be?

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