Disconnection problems with my windows 7 computer.

so im running windows 7 ultimate and for the last little while my computer that is hardwired has been disconnecting every hour on the exact minute, it doesnt do it every day just some days. It is very strange because it is only my computer.

i went back and checked the logs for the minute it disconnected and found that an error occurred with "service control manager" could this be the cause of my problems and if so how could i fix it ?

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