How to reinstall or repair Internet Explorer version 6, 7 and 8 in Windows Vista and Windows XP

Copied from the Source: http://support.microsoft.com/kb/318378
Article ID: 318378

You may have to reinstall or to repair Internet Explorer in Windows Vista and Windows XP if you have problems with Internet Explorer because of damaged files or missing registration information.

Methods to follow for Internet Explorer 7 or Internet Explorer 8

Method 1: Reset the Internet Explorer settings
If you have Internet Explorer 7 or Internet Explorer 8 installed, you can repair damaged files or missing registration information in Internet Explorer 7 or in Internet Explorer 8. To do this, follow these steps:

1. Start Internet Explorer.
2. On the Tools menu, click Internet Options.
3. On the Advanced tab, click Reset.
4. In the Reset Internet Explorer Settings dialog box, click Reset to confirm.

Method 2: Reinstall Internet Explorer 7 or Internet Explorer 8
For Internet Explorer 7
To download and reinstall Internet Explorer 7 for Windows XP, visit the following Microsoft Download Center Web site:

http://www.microsoft.com/downloads/details.aspx?FamilyId=9AE91EBE-3385-447C-8A30-081805B2F90B (http://www.microsoft.com/downloads/details.aspx?FamilyId=9AE91EBE-3385-447C-8A30-081805B2F90B)

For Internet Explorer 8
To download and reinstall Internet Explorer 8 for Windows XP, visit the following Microsoft Download Center Web site:

http://www.microsoft.com/windows/internet-explorer/?ocid=ie8_s_ad7fa1d4-a75b-4df7-ad63-f581977282a8 (http://www.microsoft.com/windows/internet-explorer/?ocid=ie8_s_ad7fa1d4-a75b-4df7-ad63-f581977282a8)

Method 3: Install Windows XP Service Pack 3
You may be able to resolve problems with Internet Explorer 7 by installing Windows XP Service Pack 3.

To install Windows XP Service Pack 3, follow these steps:

1. Visit the following Microsoft Web site:
http://update.microsoft.com (http://update.microsoft.com)
2. Click Express Install (Recommended).
3. If your computer qualifies, Windows XP Service Pack 3 will be one of the updates that are automatically selected. Click Install.
4. Review the Microsoft Software License Terms. Then, if you agree with the terms, click to accept them

For more information how to obtain the latest Windows XP service pack, click the following article number to view the article in the Microsoft Knowledge Base:
322389 (http://support.microsoft.com/kb/322389/ ) How to obtain the latest Windows XP service pack

Methods to follow for Internet Explorer 6
Any of the methods in this article may resolve your problem. Feel free to select the one that you are most comfortable with.

Recommendation We recommend that you install the latest version of Internet Explorer, version 8. Installing the latest version of Internet Explorer will resolve several issues that were experienced in earlier versions of Internet Explorer. The latest version also includes the latest security, performance, and feature enhancements. If you do not want to install Internet Explorer 8, or if for some reason cannot do this, use the methods that are listed here. Start with Method 1 to reinstall Internet Explorer 6.

For information about how to install Internet Explorer 8, visit the following Microsoft Web site:
http://www.microsoft.com/windows/products/winfamily/ie/default.mspx (http://www.microsoft.com/windows/products/winfamily/ie/default.mspx)
Note After you install Internet Explorer 8, you can repair damaged files or missing registration information in Internet Explorer 8. To do this, follow these steps:

1. Start Internet Explorer 8.
2. On the Tools menu, click Internet Options.
3. On the Advanced tab, click Reset.
4. In the Reset Internet Explorer Settings dialog box, click Reset to confirm.

Method 1: Install Windows XP Service Pack 2 or Windows XP Service Pack 3
If you do not want to install Internet Explorer 8, or for some reason cannot do so, you may be able to resolve problems with Internet Explorer 6 by installing Windows XP Service Pack 2 or Windows XP Service Pack 3.

To install Windows XP Service Pack 2, follow these steps:

1. Visit the following Microsoft Web site:
http://update.microsoft.com (http://update.microsoft.com)
2. Click Express Install (Recommended).
3. If your computer qualifies, Windows XP Service Pack 2 will be one of the updates that are automatically selected. Click Install.
4. Review the Microsoft Software License Terms. Then, if you agree with it, accept it.

For more information how to obtain the latest Windows XP service pack, click the following article number to view the article in the Microsoft Knowledge Base:
322389 (http://support.microsoft.com/kb/322389/ ) How to obtain the latest Windows XP service pack
Method 2: Repair Internet Explorer 6 by using the System File Checker in Windows XP
If you already have Windows XP Service Pack 2 installed, and you do not want to install Internet Explorer 8, you may be able to resolve problems with Internet Explorer 6 by running the System File Checker.

To run the System File Checker, follow these steps:

1. Click Start, click Run type sfc /scannow, and then press ENTER.
2. Follow the prompts throughout the System File Checker process.
3. Restart the computer when System File Checker process is complete.

Method 3: Reinstall Internet Explorer 6 by using the Ie.inf file
If you already have Windows XP Service Pack 2 installed, and you do not want to install Internet Explorer 8, you may be able to resolve problems with Internet Explorer 6 by using the Ie.inf file to reinstall Internet Explorer 6. To do this, follow these steps:

1. Click Start, click Run, type %systemroot%\inf, and then press ENTER.
2. Find the Ie.inf file that is located in Windows\Inf folder.
3. Right-click the Ie.inf file, and then click Install.
4. Restart the computer when the file copy process is complete.

Back to the top
Troubleshooting for advanced computer users
This section is intended for advanced computer users. If you are not comfortable with advanced troubleshooting, you might want to ask someone whom you know for help or contact support. For information about how to do this, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/ (http://support.microsoft.com/contactus/)

If the methods that are listed in this article do not resolve the issue, you may be able to resolve the issue by performing an in-place upgrade (reinstallation) of Windows XP. For more information how to complete an in-place upgrade, click the following article number to view the article in the Microsoft Knowledge Base:
315341 (http://support.microsoft.com/kb/315341/ ) How to perform an in-place upgrade (reinstallation) of Windows XP

After you perform an in-place upgrade, visit the following Microsoft Web site to install the latest software updates that are available for Windows XP:
http://update.microsoft.com (http://update.microsoft.com)