CD/DVD drive is missing or not recognized by Windows or other programs...Error code 19

First, please make sure that you have the latest firmware and drivers available for your CD/DVD-ROM drive. This can be done by visiting the CD/DVD-ROM manufacturers website.
Then, clear out your C:\WINDOWS\TEMP directory (this is a storage area where files are stored before they are installed). Delete everything in this file, and your problem may be solved completely.
If this does not work, you may also need to clear out your Internet cache (temporary Internet files):
(Internet Explorer)
1. Open Internet Explorer.
2. Click on Tools -> Internet Options.
3a. In IE6 - Click on the 'Delete Files...' button on the Genral Tab
3b. In IE7 - Click on the 'Delete' button under the Browsing History section of the General Tab.
(Mozilla Firefox)
1. Open Firefox.
2. Click on Tools -> Options
3. Click on the Advanced tab -> Network Tab.
4. Click on the 'Clear Now' button under the Cache section.

- Empty your recycle bin

- Run Scandisk
1. Click Start->Programs->Accessories->System Tools
2. Select Scandisk
3. Select your hard drive. If you have more than one, you should scan each drive individually.
4. Click Standard
5. Check Automatically fix errors.
6. Click Start

- Run Defrag
1. Click Start->Programs->Accessories->System Tools
2. Select Disk Defragmenter
3. Select the hard drive you wish to defrag and click ok.

1.Make sure that you have inserted both the required batteries (New batteries) into the wireless pointing device and that they are positioned in the correct direction.
2. Resync the mouse.
3.If you do not have the resync button follow the next step
4.Test the device on a different computer
If the issue continues to occur, test the mouse on a different computer in a different environment. If you can replicate the problem in a different environment, you may have a defective device. If this is the case, see the "More Information" section for information about how to contact Microsoft Supplemental Parts to obtain a replacement device.
5.Test the mouse by using the Mousinfo diagnostic tool
The Mousinfo diagnostic tool is installed together with the IntelliPoint software. If you do not have this software, you cannot open the tool.

To install the IntelliPoint software, visit the following Microsoft Web site:
http://www.microsoft.com/hardware/download/download.aspx?category=MK
6.To open the Mousinfo tool, follow these steps.

* Windows Vista or Windows 7
1. Click Start
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Start button
.
2. Click All Programs.
3. Click Accessories.
4. Click Run.
5. In the Open box, type mousinfo, and then click OK.
* Windows XP
1. Click Start.
2. Click Run.
3. In the Open box, type mousinfo.
4. Click OK.
6.Click the mouse buttons to check whether the button clicks are recognized as UP and DOWN commands in the tool. If the mouse buttons are not recognized, you may have a defective device. If this is the case, see the "More Information" section for information about how to contact Microsoft Supplemental Parts to obtain a replacement device. However, the best way to determine whether the device is defective or damaged is to try the device on a different computer.
7.Uninstall any conflicting mouse software
If you have any other mouse software that is installed, such as Logitech or touchpad software, that software may conflict with the IntelliMouse software. To uninstall the other software, follow the appropriate steps for your version of Windows.
8. 1.
* Windows Vista or Windows 7

Open Programs and Features in Control Panel. To do this, follow these steps:
1. Click Start
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Start button
.
2. In the Start Search box, type appwiz.cpl.
3. Press ENTER.
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User Account Control permission
If you are prompted for an administrator password or for confirmation, type the password, or click Continue.
* Windows XP or earlier versions of Windows

Open Add or Remove Programs in Control Panel. To do this, follow these steps:
1. Click Start.
2. Click Run.
3. Type appwiz.cpl.
4. Click OK.
2. Find any other mouse software in this list, and follow the instructions to remove the software.
3. Restart the computer.
9.If the issue continues to occur-Remove and reinstall the IntelliPoint software

1. View the list of programs that are installed on the computer. To do this, follow the appropriate steps for your version of Windows.
* Windows Vista or Windows 7

Open Programs and Features in Control Panel. To do this, follow these steps:
1. Click Start
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Start button
.
2. In the Start Search box, type appwiz.cpl.
3. Press ENTER.

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User Account Control permission
If you are prompted for an administrator password or for confirmation, type the password, or click Continue.
* Windows XP or earlier versions of Windows

Open Add or Remove Programs in Control Panel. To do this, follow these steps:
1. Click Start.
2. Click Run.
3. Type appwiz.cpl.
4. Click OK.
2. Remove Microsoft IntelliPoint. To do this, follow the appropriate steps for your version of Windows.
* Windows Vista or Windows 7
1. Click Microsoft IntelliPoint.
2. Click Uninstall/Change.

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User Account Control permission
If you are prompted for an administrator password or for confirmation, type the password, or click Continue.
3. Click Yes to confirm that you want to remove the program.
* Windows XP
1. Click Microsoft IntelliPoint.
2. Click Add/Remove.
3. Click Finish.
4. Click OK.
3. Restart the computer.
4. Download and install the latest version of the IntelliPoint software. To do this, visit the following Microsoft Web site:
http://www.microsoft.com/hardware/download/download.aspx?category=MK (http://www.microsoft.com/hardware/download/download.aspx?category=MK)

You may need to reinstall your webcam driver to your computer to try to fix it.

Windows XP
1. Click start
2. Click run
3. Type devmgmt.msc press enter
4. Look for imaging devices
5. Right click it and click on uninstall
6. Restart the computer
7. It will automatically reinstall the driver

Windows Vista
1. Click pearl button
2. Click start search box
3. Type devmgmt.msc and press enter
4. Look for imaging devices
5. Right click it and click on uninstall
6. Restart the computer
7. It will automatically reinstall the driver
If you have the installation driver, you can try to use that as well.

If that didn't work you may want to restore your computer before that problem occur. Windows Operating system has the capability to restore.

Windows XP
1. Click Start
2. Click All Programs
3. Click Accessories
4. Click System Tools
5. Click System Restore
6. Choose a clickable date where you can restore your computer before the issue began.

Windows Vista
http://www.howtogeek.com/howto/windows-vista/using-windows-vista-system-restore/

2 ways
1.start - settings - control panel - add remove programs - click on add /remove windows components - click on checkbox front of IIS click next (you mus have the windows xp cd)

2. or you can download from microsoft (must be genuine windows)

Go to the Start menu and select Control Panel
In the search box, type in "update."
Click on the link to turn automatic updating on or off.
Select from the available options including the time you'd like updates to be downloaded and whether you'd like to be notified and asked before downloaded updates are installed.
1. Go to Start button > All Programs > Windows Update.
2. In the left pane, click Change settings.
3. Select Install updates automatically.
4. Under Recommended updates, select the Include recommended updates when downloading, installing, or notifying me about updates check box, and then click OK.
5. Make sure you click Check for updates to make sure your computer has the latest updates installed. You might need to shut down and restart you machine after the updates are applied.