Is this normal? (see image)

My sister’s computer (Win7 Ultimate) has been trying to access my computer (Win7 Home Premium), from these various ports. I recently wiped my HDD and reinstalled my OS. We are both connected to the same router with DD-WRT.

Is this Windows trying to establish file/printer sharing, or could it be something malicious?

full sized image

edit: image URL added by Mod. kail

Quite normal between devices on a LAN.

The 137 to 139 are for NetBIOS (file and printer sharing)
The 2869 is SSDP discovery
The 5357 is part of Network discovery

You’ll have to run a netstat -ano to find the PID of the svchost using port 50898. From the PID you can tell which hosted process is making the call.