The DHCP allocator has disabled itself on IP address

I am not sure if this is a network issue, but I have been experiencing serious problems with the system freezing on a regular basis, especially when uploading, downloading and moving large and medium sized chunks of data around the system:

The following has been highlighted:

1. The DHCP allocator has disabled itself on IP address 192.168.1.102, since the IP address is outside the 192.168.0.0/255.255.255.0 scope from which addresses are being allocated to DHCP clients. To enable the DHCP allocator on this IP address, please change the scope to include the IP address, or change the IP address to fall within the scope.

2. The driver detected a controller error on \Device\Harddisk5\D.


Windows Version      Microsoft Windows XP Home Edition
Processor      
Manufacturer      Intel(R) Pentium(R) 4 CPU 3.40GHz
DVD/CD-ROM Drives      HL-DT-ST DVD-ROM GDR8164B
                                  HL-DT-ST DVD+-RW GWA4164B
Disk Drives      Maxtor 7L250S0 232.8Gb
Display Adapters      RADEON X600 256MB HyperMemory 256Mb
IDE ATA/ATAPI Controllers      Intel(R) 82801G (ICH7 Family) Ultra ATA Storage Controllers - 27DF

Regards
Ian Frostick