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If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Another way to prevent getting this page in the future is to use Privacy Pass. Setup with the USB bitcoin miner to the USB powered hub with fan. USB hub must be at lest 1.
Also the Rpi heatsink and fan. 7 without burning the core processor. Install fresh Raspian on your SD card with a minimum of 8gb. Install Putty software and get into the terminal.