As an interesting note, I tried several different adapters, and the logs showed that none of them were able to be loaded.
- 00:00:03.473 IntNet#0: szNetwork={HostInterfaceNetworking-LAN Realtek Gigabit} enmTrunkType=3 szTrunk={\DEVICE\{5A845944-0CBE-4AAD-B4EB-AAD721067730}} fFlags=0x0 cbRecv=223232 cbSend=36864
00:00:03.473 PDM: Failed to construct 'e1000'/0! VERR_SUPDRV_COMPONENT_NOT_FOUND (-3700) - The component factory was not found.
00:00:03.681 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={0a51994b-cbc6-4686-94eb-d4e4023280e2} aComponent={Console} aText={Failed to open/create the internal network 'HostInterfaceNetworking-LAN Realtek Gigabit' (VERR_SUPDRV_COMPONENT_NOT_FOUND).
00:00:03.681 Failed to attach the network LUN (VERR_SUPDRV_COMPONENT_NOT_FOUND).
00:00:03.681 Unknown error creating VM (VERR_SUPDRV_COMPONENT_NOT_FOUND)} aWarning=false, preserve=false
00:00:03.685 Power up failed (vrc=VERR_SUPDRV_COMPONENT_NOT_FOUND, rc=E_FAIL (0X80004005))
00:00:02.241 IntNet#0: szNetwork={HostInterfaceNetworking-LAN Realtek Gigabit} enmTrunkType=3 szTrunk={\DEVICE\{5A845944-0CBE-4AAD-B4EB-AAD721067730}} fFlags=0x0 cbRecv=223232 cbSend=36864
00:00:02.241 PDM: Failed to construct 'pcnet'/0! VERR_SUPDRV_COMPONENT_NOT_FOUND (-3700) - The component factory was not found.
00:00:02.449 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={0a51994b-cbc6-4686-94eb-d4e4023280e2} aComponent={Console} aText={Failed to open/create the internal network 'HostInterfaceNetworking-LAN Realtek Gigabit' (VERR_SUPDRV_COMPONENT_NOT_FOUND).
00:00:02.449 Unknown error creating VM (VERR_SUPDRV_COMPONENT_NOT_FOUND)} aWarning=false, preserve=false
00:00:02.454 Power up failed (vrc=VERR_SUPDRV_COMPONENT_NOT_FOUND, rc=E_FAIL (0X80004005))
This happens in 3.0.4, 3.0.8 and 3.0.10.
Running as administrator, so there are no restrictions. It just doesn't work.
I did a complete uninstall and reinstall of various versions, including deleting the .Virtualbox directory, cleaned the registry of all VBOX entries and created a new machine and reinstalled the VB additions. This machine works fine with NAT, even gets an address (when I set it to use DHCP) from the ISP (Comcast) even though the client has 2 static IPs. I know the drivers on the guest are OK, it's something in VBOX. I thought it might be a problem with the NIC, but since NAT works, the bridging itself that seems to be broken. Yes, the VBOX bridging driver is checked on each NIC.
Additional dreck. On different occasions VBOX killed the network on the host. I fixed that by uninstalling VBOX, deleting the NICs and reloading the drivers for the host. I also upgraded the drivers on the host NICs just in case that was the problem. So far, nothing has helped. I've had VBOX running on a number of machines running various versions of Ubuntu Server 64, a laptop running XP and other systems running SBS 2003, XP various service packs, etc. Except when I'm using a cellular modem, I use bridging. With the cellular modem, since it only gets one IP address, I have to use NAT.
It's discouraging to think that I will have to go back to MS Virtual Server, but if it works and VBOX doesn't, there's not much choice.
Any constructive ideas??? Is there a reason to think that going back before 3.0.4 will produce any different results??