>I installed SP4. Nothing changed for my mouse driver problem, nor for the fax problem. :(

I haven't been able to duplicate the problem (I've installed and replaced a Logitech Trackman with a standard Intellipoint MS Mouse, and it wouldn't break under SP3 or SP4, so something else is causing the problem.)

One thing I have found is that some products install registry entries that will break Control Panel applets by dropping in Control Panel extensions when installed, and then failing to remove them when replaced (I got bit big time by a Diamond Video card; once it installed, the uninstall failed to remove some applets, so that I couldn't run Control Panel/Display, or invoke it from anywhere, with anything but a Diamond card afterwards. It took spinning through the entire HKEY_LOCAL_MACHINE hierarchy looking for Diamond 'droppings' that hadn't gone away to fix it. I drove a technician at STB nuts with this one...)

>
>Vlad
>
>>>>If so, maybe something got hosed. I'd look at running an NT install using the Repair option, followed by reinstalling SP4 and the Option Pack if you use any of its features.
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>>>I guess it's something I installed after SP3. (I don't have SP4). But I don't want to reinstall NT because I'm not sure that after that I will not have to reinstall everything else. And if I have to reinstall all the other software... how do I know it will not be the same in the end?
>>
>>using the Repair option allows you to control what exactly is being 'fixed' and replaced - it won't create a complete clean install unless you tell it to do so. Make a fresh Emergency Disk with RDISK, and then run the install from the three disk set (create them from the CD with the WINNT32 /ox command line option if you can't find them). I'd let it replace drivers and check the drives; reinstall SP3 and any hotfixes afterwards.
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>>I checked my own systems here; NT Server under both SP3 and SP4 will both allow the mouse driver to be changed for users with default -local- administrator privileges; domain admins (members of the Domain Admin group who are not members of the local machine's Administrator list) do not necessarily have rights to administer the local machine configuration. In order to alter drivers, the account must have the "Load and unload device drivers", "Restore files and directories" and "Shut down the system" privileges granted. A member of the local Administrators group by default has the privileges, and a member of Domain Admins does not hold the first two privileges.
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>>>
>>>>If you do install SP4, and you're running an AGP video card (the ones I've been bitten by have been the Matrox G200 and The DIamond Viper V330 and V550), load SP$ before running the manufacturer's video driver install. The Matrox card in particular locks up in odd places once the actual SP4 install starts (in at least one case, I had to go back and do a complete reinstall of NT after an abortive partial SP4 upgrade) and SP4 simply refused to install at all with the Diamond drivers in place. In both cases, reverting the drivers to Standard VGA (or using the straight VGA boot) allowed SP4 to install, and reinstalling the video drivers after the upgrade went smoothly.
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>>>No. I have SP3 with an S3 video card using NT's driver.
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>>>Thanks...
>>>
>>>Vlad