I experienced the same situtation

Anyone can help?

Most likely after installation of SP3
(as well as itune and sony digital camera software)
My XP Pro resulted in all
1)built-in memory card readers disappeared
2)all USB not function

there are 5 unkown devices in my device managers and no matters how I cannot found the drivers

Tried

a) uninstall all usb device and restart
b) update intel chip
c) reset the cords of the memory cards
d) update driver from hp (my PC is HP Pavilion a6128hk)

You respond to a message, change the subject line to some "me too" spiel and
expect something?

This is the conversation in question

It is over a year and a half old and is unlikely to be the same situation as
you are having.

If your computer came with Windows XP installed (when you bought it) - you
need to go to the manufacturer's web page - specifically their
download/drivers section - and download and install *all* drivers for your
computer/your OS.

Given what you have, start here:
http://h10025.www1.hp.com/ewfrf/wc/p...&lang=en&cc=us

You probably should read this (seems that is a Vista machine and that is
really what HP supports for it.)
http://h10025.www1.hp.com/ewfrf/wc/d...roduct=3454962

Continue to here:
http://h10025.www1.hp.com/ewfrf/wc/s...roduct=3454962

It doesn't look like HP is going to be much help - so you will need to go to
the actual manufacturer of each component in your system to download the
drivers. That's even pretty much what HP tells you - they are going to be
no help.

Unfortunately for you - your problem is *not* with Windows XP - it is with
the manufacturer of your product (HP) and yourself (for buying a Vista
computer and trying to downgrade to XP - when you probably should have just
called and gotten an XP computer at the time if that is what you wanted.
They were still selling them up to the middle of this year - at least.)
You'll need to search for each driver yourself and hope you find them all...
Or restore the system to Vista.

The motherboard in a6128hk is ECS 945GCT-HM, based on Shenan's HP info. ECS would have
made this motherboard as an OEM, so while it might be fun to try to find it on the
ECS site, they won't provide drivers for HP customers.

http://h10025.www1.hp.com/ewfrf/wc/d...roduct=3632125

Chipset is 945GC/ICH7.

You could start with the chipset drivers from Intel, for the chipset. I had a hard time
finding something relevant, thanks to Intel's ideas on organizing downloads. The purpose
of this, is to get the entries in Device Manager labeled.

http://downloadcenter.intel.com/Deta...d=960&lang=eng

( http://downloadmirror.intel.com/1849...st911autol.exe )

You can also look at the tail end of the C:\WINDOWS\setupapi.log for
more hints as to what is going on.

Once the chipset driver is installed, WinXP should be able to load
the Microsoft USB drivers contained within your OS. The USB driver
doesn't come from Intel, it comes from Microsoft and is bundled
with the OS.

In theory, you could use Device Manager, find the thing without
a driver, do Properties, find the Device ID, and figure out from
that, what driver is needed. But there are more Device ID types,
than there are drivers to cover them, and some of them are
hard to identify. For example, I have this in Device Manager
right now -

CMI\CHILD0000\5&19BF35E9&3&0000

There is no VEN/DEV in the identifier, so if I was using VEN/DEV to
find a driver, I'd be out of luck. The fact it says "CMI" and I have
a CMI sound card, and the sound card has a Game Port, I can guess at
what it is. But in terms of a straight lookup, I'd have had a hard
time resolving that one. Some Device IDs will mention ACPI or PNP
numbers, which are "standard" devices, and the same goes for those.
It can take a bit of research, to figure out what the thing is,
and why it didn't just get installed by the OS.

*******

You'll likely need graphics drivers, as the graphics output on your
system could be coming from the 945GC chip, via a VGA connector in the
I/O plate area. Intel has a driver for that as well. Install this
after the one above. If you're using a separate video card instead,
then you would not need this.

"Intel Graphics Media Accelerator Driver for Windows XP (exe) - 945G, 945GC, 945GT, and 945GZ"

http://downloadcenter.intel.com/Deta...16835&lang=eng

*******

RTL8101E Network driver ("WinXP 32/64 and Win2K Auto Installation Program ")

http://www.realtek.com.tw/downloads/...&GetDown=false

( PCIE_Install_XP_2K_5742_12212009.zip 5,385,462 bytes )

*******

RealTek HDAudio drivers.

"Windows 2000, Windows XP/2003(32/64 bits) Driver only (Executable file)"

http://www.realtek.com.tw/downloads/...&GetDown=false

( WDM_R239.exe 30 megabytes or so )

The same situation as what?

What are your symptoms now ?

How many unknown items are left ?

[Calvin Hui]

Thank Shenan Stanley and Paul.
but it still don't work.

[Calvin Hui]

I have bought a new PCI USB card, but it also cannot found the right drivers.

http://i694.photobucket.com/albums/v...roblem/aaa.jpg

http://forums.techarena.in/windows-d...rs/1287409.htm

Have you looked in the setupapi.log file yet ?

It looks like you added a VIA USB card, judging by the fact that there is one VIA
entry in the "aaa.jpg" picture. I'm surprised the Intel entries for the ICH7
Southbridge and its USB ports are not showing up.

You may see these in the setupapi.log file. When the USB device is installed,
the Device Manager "Properties" for the item, under the "Details" tab, will
show the hardware plug and play values. 1106 = VIA Technologies.

VIA USB2 = PCI\VEN_1106&DEV_3104

VIA USB1.1 = PCI\VEN_1106&DEV_3038

My suspicion is, you've damaged something in the registry, which is important
to discovering the hardware.

Do you have any System Restore points from before the incident ? I'm
suggesting that as a means to find an undamaged registry (from before
you started experimenting).

(Note that System Restore doesn't track things in your My Documents folder.
If you keep downloads outside of the Microsoft defined file structure,
System Restore can remove newly added files, if you use a restore point
to return to a previous time. So be careful when using System Restore, if
you keep files outside of My Documents.)

Another tool you can use, is Everest. It will also display VEN/DEV
info for the hardware visible to the program. Even if Everest cannot
identify a piece of hardware, it will still be able to display VEN/DEV.

(The last free version of Everest, a program from Lavalys.com)
http://majorgeeks.com/download.php?det=4181

Look in Devices:PCI Devices, then look for "Device ID" to get the 1106-3104
type numbers. That should be the USB2 component part of the VIA USB2 chip
on your new PCI card.

To identify hardware using the VEN and DEV numbers, this unofficial file
can help. People contribute hardware they've discovered, to help
others identify what is in their computer. This is a large text file
that you can save for later. If you purchased a recent version of
Everest from Lavalys, it will be using this kind of info to help identify
the hardware.

[Calvin Hui]

Thank all, Finally I fix it by installing another Windows XP on a different drive.
Now there are two Windows XP in my PC, one work fine while one having the same problem.