Problem Tcp Ip disconnect

Hi

I have a new pc and i have this problem : when i don't work for example for
1 hour, the session 5250 and the Rdi connectio go down;

in the past i followed this two links:

http://www.midrangenews.com/view?id=1256
<http://www.midrangenews.com/view?id=1256&p=3> &p=3,

https://www.ibm.com/support/pages/enabling-tcpip-keepalive-windows
<https://www.linkedin.com/safety/go?url=https%3A%2F%2Fwww.ibm.com%2Fsupport%
2Fpages%2Fenabling-tcpip-keepalive-windows&trk=flagship-messaging-web&messag
eThreadUrn=urn%3Ali%3AmessagingThread%3A2-MDBkZGRjNzAtNjY1My00ZDA1LTgzY2YtMG
RlNmZiNTk2ZTI0XzAxMg%3D%3D>

today both this links don't work anymore ;

can some one suggest how solve the disconnection problem



Thanks in advance

Gio