Windows xp: class not registered

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Re-Install your operating system

Try downloading SP3 again and save to desktop, then re-install (replacing 1st. installation). There might have been a glitch in the first download.

just install the motherboard utilkity cd and try

Try starting in Safe Mode and then uninstall it.
(press F8 during boot).

Download:Windows Vista Service Pack 1

I tried personally in WIN-XP worked same applies to Vista.

Error Message:
Error 1719. The Windows Installer Service could not be accessed. You may be running in safe mode or Windows Installer may not be correctly installed. Translation:
This message might appear when you’re trying to add or remove a program that installs via a Windows Installer MSI (Microsoft Software Installation) package file. The Windows Installer Service is the standard method for installing and uninstalling software on Windows XP. It keeps track of all of the components that need to be installed for a particular program to run and ensures that any files that are shared by programs are not removed when one of those programs is uninstalled. The Error 1719 is an indication that some Windows Installer Service files are missing or have become damaged. Solution:
The first thing to try is re-registering Windows Installer in the Windows registry. Make sure that no other programs are running and then click Start, Run, type msiexec /unregister in the Open field, and click OK. Next, click Start, Run, type misexec /regserver in the Open field, and click OK. Restart your computer and try installing or uninstalling again.

If you’re still getting the error message, the next step is to try reinstalling the Windows Installer files. In order to do this, you’ll first need to rename the existing files.

First, click Start, Run, and type msiexec /unregister in the Open field, and click OK.

In My Computer, click Search and locate the following three files: msi.dll, msiexec.exe, and msihnd.dll. They are hidden files so you’ll need to select Search Hidden Files And Folders under More Advanced Options. When you’ve found the files, rename them, by removing the .dll and .exe extensions and replacing them with an .old extension(for example msi.dll becomes msi.old).

Once you’ve renamed the files, WinXP will automatically replace them with a new copy from the dllcache (a hidden folder where copies of important system files are kept in case you mistakenly delete or rename critical system files). Restart your computer and try to install or uninstall the program again.

Finally, if neither of the above processes corrects the problem, boot into Safe Mode, and go through the above steps again, first re-registering and then reinstalling.

or

Go through the following links:

http://www.vistax64.com/vista-general/45784-windows-vista-error-1719-help-3.html

Hope this will be helpfull

Please rate me...

Thanks & Regards.
Nandu

DVD writing isn't possible in Windows XP without additional software such as Nero.

Do you have another DVD writing program installed in your computer?

HERE IS THE SOLUTION :
click on the link given below and find oc25.dll....if you are unable to find press keyboard key cntrl + f .A dialog box will appear now type oc25.dll and hit find key and you will find the oc25.dll .click on that file to download it to your computer.

http://www.dlldump.com/dll-files/O_2.html

Once you have downloaded the file you are looking for you still need to make sure Windows or the program causing the error can find it. Follow these steps:

1. If you are encountering an error with Windows...
The file you downloaded needs to be placed into the Windows System directory. On most machines this is one of the following locations:
C:\Windows\System (Windows 95/98/Me),
C:\WINNT\System32 (Windows NT/2000), or
C:\Windows\System32 (Windows XP).

If you are encountering an error with a particular program...
The file most likely needs to be in this program's directory. This directory is where the program is installed (i.e. c:\Program Files\ThisProgram).

If this step solves the problem, you do not need to complete step 2.

2. You may to register this file with Windows. Click on the Start Menu and then on 'Run'. If you are replacing a Windows system file, type the following command:
regsvr32 \windows\system\file.dll (Windows 95/98/ME),
regsvr32 \WINNT\system32\file.dll (Windows NT/2000), or
regsvr32 \windows\system32\file.dll (Windows XP).

For example, 'regsvr32 \windows\system\apphelp.dll'

If you are replacing a file for another program, change the directory where appropriate. For example, 'regsvr32 \program files\Norton\xyz.dll'

If the file is registered correctly, you will receive a positive confirmation message.
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Please let me know your feed-back.

Thanks
dilipbagdi
Technical Associate

Hi

It seems you installed an outdated (16bit Program) for the ScanMaker 4. 16Bit applications/programs and generally DOS based (Windows 3.x and 95) and will not run properly from Windows XP.

First, check http://support.microtek.com/product_dtl_2.phtml?prod_id=23 and download and install Drivers and Plugins for Windows XP.

You may need new 3rd Party Scanner/Image Applications that work in Windows XP. However, if you still want to use the 16Bit application then you will need to run the program in 16Bit Compatibility Mode. To do this, right-click the program executable or shortcut, choose propertise from the drop-down menu, go to the Compatibility Tab and put a tick in "Run this program in compatibility mode for:" From the drop down menu, choose Windows 95 or 98 and apply.

Finally, check the the User's Guide or ReadMe file(s) (if you have it) for more info. Especially, check the recommended OS for the Applications.

I might be wrong, but i think ScanMaker 4 has a SCSI interface. If this is correct, then your laptop or port replica must have a SCSI port. NB: SCSI is not the same as Printer LPT Port.

Regards
Mike