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The “File Download – Security Warning” dialog box opens when you try to open Internet Explorer 7

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On May 10, I discussed a problem with opening Internet Explorer. Microsoft has posted a KB article that discusses the possible solution. Microsoft has confirmed that the problem is caused by the May 2007 Cumulative Security Update for Internet Explorer (MS07-027), as reported by several MVPs.

Problem: The problem is caused if you have the Temporary Internet Files (TIF) moved to a location outside the Users folder hierarchy while you have the Protected Mode and the Phishing filter enabled.

Solution: The solution is either to move the TIF back to its original location or to configure permissions for TIF folder as described below. If you move TIF folder out of Users folder hierarchy, e.g. to the root of drive C, then you would have to give the user full-control permission at the root of drive C, which may not be a good idea. For security reasons, a better option is to move the TIF folder back to it’s original location within the user’s profile while Microsoft investigates other possible solutions for this issue.

The following procedure is for modifying permission on Windows Vista computers. Make sure you understand the consequences of this procedure before you implement it.

1. Click Start Start button, type Internet Options in the Start Search box, and then click Internet Options in the Programs list.
2. On the General tab, click Settings in the Browsing History area.
3. Click View Files. The “Temporary Internet Files” folder opens.
4. In the Windows Explorer address box, click the folder name that comes before Temporary Internet Files.
5. Click Organize, and then click Properties.
6. On the Security tab, click Edit.
7. In the Group or user names box, click the name of the affected user. If the name of the affected user is not listed, follow these steps:

a. Click Add.
b. In the Enter the object names to select box, type the name of the affected user, and then click OK.
c. In the Group or user names box, click the name of the affected user.

8. In the Permissions for User_Name box, click to select the Full Control Allow check box.
9. Click Apply, and then click OK.
10. Close Windows Explorer.
11. Click OK two times.
12. Start Internet Explorer 7.

On a Windows XP-based computer or on a Windows Server 2003-based computer, follow these steps:

1. Click Start, click Run, type inetcpl.cpl, and then click OK.
2. On the General tab, click Settings in the Browsing History area.
3. Click View Files.
4. In Windows Explorer, move to the folder that contains the “Temporary Internet Files” folder.
5. In the right-pane, right-click an empty area, and then click Properties.
6. On the Security tab, click the name of the affected user in the Group or user names box. If the name of the affected user is not listed, follow these steps:
a. Click Add.
b. In the Enter the object names to select box, type the name of the affected user, and then click OK.
c. In the Group or user names box, click the name of the affected user.
7. In the Permissions for User_Name box, click to select the Full Control Allow check box.
8. Click Apply, and then click OK.
9. Close Windows Explorer.
10. Click OK two times.
11. Start Internet Explorer 7.

For more information, check out the KB article 937409.

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