Driver Conflict When Installing Software

I am currently touring in England. I have bought a Vodafone pay-as-you-go mobile internet USB modem that works well on my laptop, a Toshiba Tecra S2 running XP SP3, but will not install on my wife’s older Toshiba Satellite Pro 6100, also running XP SP3. When I plug the dongle into a USB port on her laptop and the software starts to load, I very quickly get a blue screen with white text that tells me Windows has encountered a problem and has shut down to prevent damage. At the bottom of the screen there is a progress report on the dumping of physical memory. The main error message below the shutdown statement is as follows: DRIVER_IRQL_NOT_LESS_OR_EQUAL. There are then a number of comments, and then a heading "Technical Informationâ€, then Stop:0x000000D1 (0x00000000, 0x00000002, 0x00000001, 0xF839DE13)
Dpif1tnt.sys "“ Address F839DE13 base at F839B000, Datestamp 39ac0744

This means nothing to me except that it appears there is a driver conflict, presumably between the Vodafone dongle software and something already on the laptop. Is there any way to fix this without major software surgery? As I am touring I don’t have ready access to the Internet to download new versions of drivers, but if a reliable solution required this I would take the laptop to an internet connection point.

Thanks for any suggestions.

Alistair

 

No complaints about the weather - it's a cold Winter in New Zealand!

Rechecked - it's actually dpifltnt.sys. It's an odd font and I misread it.

Sorry for confusion!

 

Yes it is, much to my surprise. I presume it was part of a software package that was loaded by a client some years ago when I was required to use Citrix to talk directly to their system.

I've just tried to uninstall Defender but it asks me for a user's PIN before it will permit removal of the software. As I haven't used the software for years, I have no idea what the PIN is. I found a file called dpifltnt.sys in the Windows System32 folder. I tried renaming it to see if that removed the conflict, but nothing changed. I don't know if simply deleting the file will help, or even if I'll be allowed to delete a .sys file but I won't try that until I've had your advice. Any thoughts?

 

Sorry for lack of response - been out of mobile range so couldn't get on line. Yes the rename stuck. I've searched for all files, hidden and otherwise, dll and sys, that contain the first part of the name, and there is no other. When I look at the properties of the file, I get told it is from an unknown application so I have no way of knowing if it is from Defender.

Defender still won't let me delete it as I don't know its password. Is there anyway I can remove it in brutal fashion rather than using its own uninstall process as Control Panel uses?

I looked at the Google link you mentioned. It also mentions the possibility of a USB driver problem. We also get the "This device can perform faster" message" when we plug in some USB devices, even though the laptop runs USB 2, despite being 6 years old. It's been doing this for years and we just ignore it as the devices still seem to work perfectly well, but I wonder if we've finally found a device for which it's significant.

I'm stumped so any suggestions gratefully received.

 

Thanks for the suggestion to contact Quest, Pete. I was able to confirm on the web that Defender as supplied now by Quest is the successor to the Defender supplied by Axent software when I used it years ago, after the company passed through the hands of Symantec and others. I emailed their support people and received a very helpful reply that told me which Registry entry to redit and files to delete to enable the uninstall, and it all worked! I have now installed the Vodafone software on my wife's laptop, and it works perfectly. Phew!

Many thanks for your help.

Alistair