When you reinstall ie, the system checks the existing version. If you find that the version is not a higher version, the installation will be blocked.
① To reinstall IE 5.0, follow these steps:
Step 1: Open Registry Editor, find [hkey_local _ machine \ Software \ Microsoft \ Internet Explorer], and click the version vector key.
Step 2: double-click the IE sub-key in the right pane, change "5.0002" to "4.0", and click "OK" to exit the "Registry Editor ".
Step 3: After the instance is restarted, You can reinstall IE 5.0.
② There are two methods to reinstall IE 6.0:
Method 1: Open Registry Editor and find [hkey_local _ machine \ Software \ Microsoft \ Active Setup \ Installed Components \ {89820200-ecbd-11cf-8b85-00aa005b4383}], change the DWORD Value of isinstalled to 0.
Method 2: on the Windows XP installation board, run the "rundll32.exe setupapi" window at the start of "installation" and install hinfsection defaultinstall 132% WINDIR % \ INF \ IE. inf ".