I have an odd thing occuring here. From a Windows 7 netbook, I cannot ping an HP printer on the network, while all other machines (Win7/Vista) can. And the netbook can also ping everything else on the LAN.

Example showing that the netbook can ping 192.168.3.4 but not 3.6.

C:\Users\backdoor>ping w7ue1m

Pinging w7ue1m.corp.biz.co.uk [192.168.3.4] with 32 bytes of data:
Reply from 192.168.3.4: bytes=32 time=7ms TTL=128
Reply from 192.168.3.4: bytes=32 time=4ms TTL=128
Reply from 192.168.3.4: bytes=32 time=2ms TTL=128
Reply from 192.168.3.4: bytes=32 time=2ms TTL=128

Ping statistics for 192.168.3.4:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 2ms, Maximum = 7ms, Average = 3ms

C:\Users\backdoor>ping uktnprint1

Pinging uktnprint1.corp.biz.co.uk [192.168.3.6] with 32 bytes of data:
Reply from 192.168.3.0: Destination host unreachable.
Reply from 192.168.3.0: Destination host unreachable.
Reply from 192.168.3.0: Destination host unreachable.
Reply from 192.168.3.0: Destination host unreachable.

Ping statistics for 192.168.3.6:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),`enter code here`

The IPCONFIG result for the netbook is fine.

   IPv4 Address. . . . . . . . . . . : 192.168.3.0
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . : 192.168.1.1

Most unusual network thing I've seen in years. I must reiterate that only this netbook is having trouble pinging/printing.

Thanks, Luke

** UPDATE **

Am now on a Vista box, and here's the IPCONFIG:

   IPv4 Address. . . . . . . . . . . : 192.168.3.3
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . : 192.168.1.1


Pinging uktnprint1.corp.biz.co.uk [192.168.3.6] with 32 bytes of data:
Reply from 192.168.3.6: bytes=32 time=2ms TTL=60

Firewall is off. I'll look into the chance of an IP conflict because it's the only thing I can think of - compare arp caches of each machine.

Cheers!