I have been using SecureLine for some time and during that period the other users on my home network complain of packet loss, lags, and poor response.
We narrowed the problem down to my PC and then eventually to Secureline.
Since I removed Secureline there have been no more problems.
I would be grateful for any info or advice on this. 
How is the network setup ?
4 PCs connected via Ethernet cables to a TP-Link WD8960N modem/router.