Internet Explorer 7 could not be installed. You must restart your system to confirm that any changes to your system are undone.
After restarting, follow the "Internet Explorer Troubleshooting" shortcut on your desktop to get more information.
Method 2
1. Determine if there is a problem that is preventing the registry from being updated:
a. Click Start, click Run, type %windir%\ie7beta3.log, and then click OK to open the Ie7beta3.log file.
Note By default, the Ie7beta3.log file is located in the C:\Windows folder.
b. Press CTRL+END to move to the end of the Ie7beta3.log file.
c. On the Edit menu, click Find.
d. In the Find what box, type IECUSTOM: Key is still unwriteable.
e. Under Direction, click Up, and then click Find Next.
If you find the "Key is still unwriteable" text, this indicates that there is a problem that is preventing the registry from being updated. For example, text that resembles the following in the log file indicates that there is a problem:
time_stamp: IECUSTOM: Key is still unwriteable registry_subkey
In this example, registry_subkey is the name of the registry subkey that is causing the problem.
If you do not find the "Key is still unwriteable" text in the Ie7beta3.log file, go to Method 2 for additional troubleshooting steps.
2. Reset the registry permissions for the registry subkey that has the incorrect permissions. To update the permissions of the registry subkey, follow these steps:
a. Click Start, click Run, type regedit, and then click OK.
b. Locate and then right-click each registry subkey that you noted in step 1e, and then click Permissions on the Edit menu..
Note The Ie7beta3.log file contains the following abbreviations:
• HKCR = HKEY_CLASSES_ROOT
• HKLM = HKEY_LOCAL_MACHINE
• HKCU = HKEY_CURRENT_USER
c. Under Group or user names, click Administrators.
d. Under Permissions for Administrators, make sure that the Allow check box is selected for the following entries:
• Full Control
• Read
Make sure that the Deny check box is not selected for any users or groups.
For more information about how to modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
310426 (http://support.microsoft.com/kb/310426/) How to use the Windows XP and Windows Server 2003 Registry Editor features
e. Click Apply, and then click OK.
f. On the File menu, click Exit.
g. Try to install Internet Explorer 7 again. You may have to repeat these steps if there are other keys that have permissions that prevent Internet Explorer 7 from installing.