With any of these install fixes, to quote Steve Cochran MS-MVP,
"It is essential that no "interfering" software be running during the install and subsequent reboot. This is particularly true of antiviral software. Most or many of the corrupt installs involve installations while AV or other software is loaded and these prevent the ability of the setup process to upgrade dlls, and consequently installations fail or are incomplete."
When you get to the point of doing the install in any of the following fixes, "Go to Start>Run>msconfig. Then disable all startup items."
In addition, I would suggest disabling ALL Norton software, particularly System Doctor and/or the Protected Recycle Bin, if present. See these links for some general help:

If you are running Windows ME and have Norton System Doctor installed:
Search your system for files called OEM****.INF (where * is variable) and the files are zero byte in size (there could be 2 or 3 thousand of them). If you find them delete them, turn off System Doctor and try the install again.
Microsoft have issued a patch that resolves this issuC:
CreateFile Improperly Returns ERROR_ALREADY_EXISTS if the Drive Is Locked and the File Did Not Exist
http://support.microsoft.com/default.aspx?scid=kb;EN-US;301540

Setup was unable to install all the components. Please close all applications and try running Setup again
http://support.microsoft.com/default.aspx?scid=kb;EN-US;202246

Setup was unable to install all the components
http://support.microsoft.com/default.aspx?scid=kb;EN-US;189679

When you attempt to uninstall Internet Explorer 5 or later, you may receive the error message Microsoft Internet Explorer *version* Setup was not completed successfully. where *version* is the version of Internet Explorer.
http://support.microsoft.com/default.aspx?scid=kb;EN-US;221475

You Cannot Finish Installing or Upgrading Internet Explorer
http://support.microsoft.com/default.aspx?scid=kb;EN-US;303399

How to Reinstall or Repair Internet Explorer and Outlook Express in Windows XP:
http://support.microsoft.com/default.aspx?scid=kb;en-us;318378

See these two Microsoft articles for lists of products known to interfere with installations:
http://support.microsoft.com/?id=kb;en-us;241234
and
http://support.microsoft.com/?id=kb;en-us;241783

And don't forget
http://www.mvps.org/inetexplorer/answers.htm#error_install

Also, check here to get the latest version of the Windows Installer appropriate for your OS:

for Windows 95, 98, and MC:
http://www.microsoft.com/downloads/release.asp?ReleaseID=32831
for Windows NT 4.0 and 2000
http://www.microsoft.com/downloads/release.asp?releaseid=32832

See for more info:
http://support.microsoft.com/?id=kb;en-us;305496

In all cases, I assume that you will be using ie6setup.exe in the c:\%SystemRoot%\Windows Update Setup Files for any re-install. If your OS is NT, then you MUST be logged on as Administrator both to install and for the first reboot for any of the following fixes. Based on my own experience, I believe this is also a requirement for Win2k, but MS does not say it's required in that case in the ReadMe. However, in article Q293907 the following does appear: "You must have administrative privileges to install and uninstall Internet Explorer 6 in Windows NT and Windows 2000. This includes having administrative privileges the first time you start your computer after you install or uninstall Internet Explorer 6."

There are three things you might want to check:


Fix # 1:
Try running ie6setup in Safe Mode. This was suggested by Microsoft Support to one correspondent and worked for him after he had tried the fixes described below. If it doesn't for you then try the following.

Fix # 2:
First, make sure in Windows Explorer/Tools/FolderOptions/View that you show hidden and system files and show extensions.
Look in your c:\windows\inf folder and see if you find any files named oemxx.inf which have a length of 0 (zero), where the xx can be any number. There could be potentially many thousands. If you do, you need to erase these. To do this, first select the c:\windows\inf folder, then hit Search. In the Search pane on the left, enter oem*.inf and down at the bottom click Size and At Most and 1 (one). Then do Search. When it finishes, you should have all of the zero length oemxx.inf files listed in the right pane along with possibly some of size 1K. Do CNTL A to select all of them. Now hold down CNTL while you click on (de-select) all of those at the top that are 1K, so the only the 0K size files are left selected. Now hold down SHIFT and click DELETE to delete the zero length oemxx.inf files without sending them to the Recycle Bin. It will take some time if you've a lot of these files, so be patient. You'll know when it's done. Symantec's System Doctor is the usual culprit, but other programs can also cause this if they're running when you do an install, particularly an install of system software, so be sure to disable any such whenever you do an install.


Now for both Fix#2 and Fix#3 re-start your computer into DOS using a boot floppy if necessary and run Scandisk C:, fixing any errors. If you're not NT or Win2k, also run Scanreg /fix. Re-boot to Windows Safe mode and defrag your computer (which will also probably take a little time), and try your install again from Safe mode.. If it works, fine.

Fix # 3:
If not, or if you didn't have such zero length oemxx.inf type files to start with, try the following. Find the c:\program files\internet explorer\uninstall information folder (It may be named something slightly different depending on your operating system, for example, just Uninstall in WinME.) It probably will be hidden, and you will have to unhide it. Right click on the folder, select properties, then un-tick the Hidden attribute. (If you don't have this folder, then create an empty one named: c:\program files\internet explorer\uninstall information - now try your install again in Safe mode, re-selecting all components, even those already bolded. See below.)
Now create a new empty folder and call it something like "IE Delete Backup". Move the contents of the \uninstall information folder to the new folder you created. (Just the contents - leave the old folder there.) Now try the install again from the start in Safe mode, re-selecting all components, even those already bolded, that you want using the Advanced option, and see if this works. It has in many, many cases, but not all. If it doesn't, you can just restore the files you saved in "IE Delete Backup". Let us know how you make out, so that if this doesn't help, perhaps someone else can suggest something else for you.

When all else fails, use IERadicator to remove IE then re-install
http://www.litepc.com/ieradicator.html