In my ongoing effort by trial-and-error to solve an hardware installation problem (that, from all evidence, points to being XP-related rather than physical), I chanced on the Event Viewer in Administrative Tools (this is Windows XP Home Edition w/all Service Packs and hotfixes loaded).
     Wherever an Error appears in the log that references the host controller driver of the problem hardware DEVICE, an second Error appears above it in the list.* This Error reads, "The A4SII300 service failed to start due to the following error:  The system cannot find the file specified."  *This is the list under System in Event Viewer and source is shown as:  Service Control Manager.
     It would seem to me that if I can obtain the file specified (A4SII300.SYS -- as found by a search of the Registry), then I would just copy it from a floppy to the path in the problem machine and then the Error msg would not reappear and the hardware device problem might even be solved.  I have DONE a search for this file A4SII300.SYS (with hidden files option) and it's not there.  I've searched my main computer running Windows XP Professional Edition and it's not on that computer either.
     The path shown for A4SII300.SYS in the Registry is:  \SystemRoot\System32\drivers\A4SII300.SYS
     I've searched the Internet for any information pertaining to this file, and it is sparse. There are references to it being: (autostart), but nothing beyond that that pertains to the file missing from a System.
     Can anyone shed any light on this topic?  Is this A4SII300.SYS file something that I have to extract from a CAB?  (I've extracted from CABs before in Windows 98SE -- but not XP -- and it's a whole new learning experience whenever I've attempted it.)Well all I can come up with is maybe an sfc /scannow to see if the file gets replaced. Unfortunately that's about all I can come up with right now. And even that's a log shot. I'll ask around at work tomorrow and see if anyone's got any ideas.     Thank you for such a fast reply. I will continue working on this mystery plus several more. In the meantime, I have also discovered through further Internet research that the .SYS file in question may be related to scanner issues (which, if true, would preclude its being related to the No. 1. problem which remains installing a particular hardware device -- covered in another post on this Forum).
     Several months ago I did attempt to install an 8-year old Mustek scanner to this computer. That was a nutty thing to do since I knew that the scanner was built when Windows 3.1 was still being used (hence it would be obsolete for XP). And, of course, the scanner didn't work.
     This is all a learning situation and I don't mind trial-and-error as I have the patience and I don't have the big bucks for professional computer repair.
Do you have a real Windows CD to do a reinstall if that is necessary to solve all of these woes?     This is a Dell Inspiron 4000 laptop that came with Windows ME pre-installed (but included the CD). Later, I installed the XP Home Edition upgrade (purchased the CD).
     I've explored the possibility of uninstalling the XP and going back to ME but the option does not appear in Add/Remove Programs (which may indicate an incomplete install of XP).  Microsoft Support gives a method to use at the Command Prompt but that procedure is halted by a msg having to do with something not being registered (did that last week, so I don't have that msg handy to quote here).
     For now, within 4 days of when my husband is going to need to take this laptop on a business trip, it is working beautifully for the purpose for which he needs it (we wanted WiFi capability for use in the hotel).  I've achieved that purpose.
     The various posts that I've placed on this board in the last 3 days have to do with what I've discovered about the state of the laptop ALONG the way.  I can give up the laptop for his use and he'll be WiFi-ing at 12Mbps on a USB 1.1 port instead of 480Mbps on a USB 2.0 port which was my OBJECTIVE that started all this troubleshooting.  He's ok with the slower speed (I'm not).  Then, I'll get back to resolving all these problems (with the help of this fine forum?) next week.How were you going to get to USB 2 on that machine?     Well, since you asked, I have other posts on this Forum which, in my mind at least, all relate to the overall quandry of upgrading to USB 2.0 port.  For history, please see my post titled "Device Manager not recognizing new hardware" in this same form (Microsoft/Microsoft Windows) which, as I post this msg, is flagged as "Yesterday 11:57:35".
     (This Forum needs ID#'s for its threads.)  The posts at that subject title answer your question re USB 2.0 (you must know, evidently, that this Dell laptop came with only one USB 1.0 (or 1.0?) port).
     Along the way, in attempting to solve the problem as to why the Type II slots do not accept the USB 2.0 PC card, I've come upon the other glitches (such as the one in this post about the Event Viewer) that I've questioned in this forum.
     I'm so far along in figuring this out that I'm almost at where I will be willing to open up the laptop to see if the power leads to the slots in the PCI cage are loose (see original post under "Device Manager" title for why I might be drawing this conclusion.  As I do not like the idea of opening a squashed-flat computer -- which is what a laptop is -- I have been doing everything I can to workaround that (for me) drastic option.  If I were dealing with a regulard desktop, no problem, been there done that.
     Thank you for pursuing this matter with me. Perhaps you might want to look at that post about "Device Manager" and would have some further insigts.Well, I don't wish to go fishing up threads, but a laptop with USB 1 ports has no device area (like a PCI card slot in a real computer) to install anything to enable it. There are some after market PCMCIA to USB adapters, but I don't know if they are reliable and certainly you would not appear to have room for a wireless card at the same time. Perhaps you could jerryrig a PCMCIA Card --> Usb 2 converter----> USB2 modem device, but that seems a long way around. The speed at which you are now receiving should be adequate for communication and a machine that old is obviously not a high end GAMING platform. Please help me if I'm missing something.     This Dell Inspiron 4000 laptop (bought new by me 5 years ago and barely used at all) has not one, but two, Type II PC slots that accept both 16-bit PC cards and 32-bit cardbus cards.  My objective is to correctly install a Belkin USB 2.0 Notebook Card Model FU52222.  This card has two USB 2.0 ports.  Then I could move the Linksys Wireless-G USB Network Adapter (which has a USB cable) off the Dell onboard USB 1.1 port and achieve maximum transfer rate by having the Linksys running on the Belkin card.
     All very do-able.  I'll get there.  Husband is content to use lower signal thru USB 1.1 port for now.  Thank you for your interest.I'll hope with you that it works and the speed increase was worth it.  

I got a PCMCIA wireless G card that works great for <$20. The only PCMCIA cards I have seen with USB 2 were more than that.