If I connect to my VPN on my laptop as a remote dial in user from a remote location it works fine. I can access my IP camera and Dreambox satellite receiver by just typing in their fixed local IP addresses in my browser.

BUT, I cannot access my LAN. Normally at home my laptop and PC connect on the Windows network automatically. I need to be able to access the PC on the VPN when away from home in the same way.

I have a fixed IP address with my ISP. Other fixed IPs are:
Router IP 192.168.75.1
LAPTOP 192.168.75.13
PC 192.168.75.19

I have tried the Windows and Draytek VPN clients with the same results. I have ZoneAlarm firewall but the problem is the same if I disable it.

Any help appreciated.

If I connect to my VPN on my laptop as a remote dial in user from a remote location it works fine. I can access my IP camera and Dreambox satellite receiver by just typing in their fixed local IP addresses in my browser. BUT, I cannot access my LAN.

What do you mean by "access my LAN" ? The second sentence seems to contradict the first...

What I mean is that when I'm away from home and connect to my VPN on my laptop I still want to be able to access my home LAN and see the folders I have shared on my desktop PC as I can when I'm at home.

When I'm away from home on the VPN currently, I cannot see my desktop PC in Networks, but I can ping it.

How can I resolve this

Do you mean view the folders by 'browsing' ? Have you tried explicit paths, e.g. \\\192.168.1.10\mydata ?