Problem:
After applying latest OS updates (October 9, 2012) on Windows XP SP3, Internet Explorer 7 (IE7) can no longer connect to Oracle Enterprise Manager (11g) via SSL (https). Firefox is able to connect to OEM.
Solution:
Update for Windows XP (KB2661254-V2) affecting certificates. Quick fix: from Add/Remove Programs, check ‘Show updates’, remove Update for Windows XP (KB2661254-V2) and reboot.
Note that removing Windows updates may affect your computer’s security. Proceed at your own risk.
*** UPDATE: Oracle has fixed the issue in MOS ID: 1489557.1 (EM Grid Control 11g Console Not Accessible Via Internet Explorer After Applying Microsoft Security Patches On Client PC)
Reference:
Microsoft Security Advisory (2661254): Update For Minimum Certificate Key Length
http://technet.microsoft.com/en-us/security/advisory/2661254
Microsoft Security Advisory (2749655): Compatibility Issues Affecting Signed Microsoft Binaries
http://technet.microsoft.com/en-us/security/advisory/2749655
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