XP

You might run into this with a QIP-based DHCP as a backend with XP SP3 clients: Some DHCP Options are not recognized on a Windows XP SP3-based client computer when the DHCP server offer includes option 43. Install KB 953761.

Long story, short: Due to the addition of vendor specific options of the XP SP3 DHCP client request, relating to NAP, the code expects DHCP options to be returned in a certain order. When paired with a MS-based DHCP server, correct behavior is observed. If used with a different DHCP server that might reorder the DHCP reply, the original XP SP3 DHCP client code might not correctly set all DHCP settings.

There is a two page thread on the TechNet forums about this issue here.

There is a handy registry setting that you can set, as long as you have XP SP2 or above, that will reset the error count once an I/O error recovers on the IDE chain. This is particularly handy for devices that like to get punted into PIO mode even though they are perfectly capable of doing DMA , 99.9% of the time. I need this for a dying hard drive that can perform DMA all day, as long as I don't go into the bad sector area where the head crashed in the past. If you're curious, this is also the same laptop that runs the ChickenCam, which is now viewable by clicking the "ChickenCam" link on the right side of the webpage.

The registry key for the IDE Primary Channel in question is a DWORD set to 1, at location:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}\0001\ResetErrorCountersOnSuccess

Depending on how many IDE channels your system has, you may need to increment the key by one for each channel.

For instance, the next channel would be listed under key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}\0002\ResetErrorCountersOnSuccess

Read more about it here!

Hopefully, the ChickenCam will run marginally faster now. You can only torment a Pentium 2-333mhz chip so much with streaming video and routing packets.