It has been noticed that Internet Explorer 8 on some Windows XP machines with SP3 crashes when installing Add-ons such as ActiveX controls or CAB installer files. This happens for no clear reason.
If this affected your browser when running the welcome page which contains the permission CAB file, you can try the following workaround:
Also, as a recommended solution, you can try uninstalling Microsoft Java Virtual Machine (MSJVM). This is not a guaranteed solution but is known to fix this problem in most known scenarios. For more information about Microsoft Java Virtual Machine, please check Microsoft support: http://www.microsoft.com/mscorp/java/default.aspx