Lost connection with the router

Masters,

We have an SBS 2011 and some other clients. Both in VM.

Every day for a few times every client and our SBS lost connection with the router. (the router set as default gateway.)

The only common think is the lost connection duration is 1 minute.

This is the log of (to)day:

 2014.06.24. 0:08:40 Router No Reply
2014.06.24. 0:09:40 Router Ok [0ms %100]
2014.06.24. 8:16:20 Router No Reply
2014.06.24. 8:17:21 Router Ok [0ms %100]
2014.06.24. 13:46:34 Router No Reply
2014.06.24. 13:47:34 Router Ok [0ms %100]
2014.06.24. 14:01:39 Router No Reply
2014.06.24. 14:02:39 Router Ok [0ms %100]
2014.06.24. 14:16:45 Router No Reply
2014.06.24. 14:17:45 Router Ok [0ms %100]

Our ISP say the connection is stable and they did’n seen any connection problem.

What should i check in our Mikrotik router? How to check if this router our switch our anything else the problem?

Any idea highly appericiated ‘coz im pullin’ out my hair!

Thank you

What and what other devices do you have on the network? If you have swithes, change it 1st. If all other things are ok, then reset the router and enable only the basic thinks and test for a while b4 enabling others.