After some update I'm getting this message:
"specified cryptographic algorithm is not supported on this platform"
every time I try even change update's status (revise, decline, expire). I'm connecting from Windows XP SP3 pro x86 to Windows Server 2003 R2 x86, both with last updates.
Generally, from XP i can view status but can't change anything: "algorithm is not supported"
Here is the solution (reg file that must be installed in XP SP3 with installed NET 3.5 and 4):
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography\Defaults\Provider\Microsoft Enhanced RSA and AES Cryptographic Provider]
I think this will be in FAQ.
Hope'll help someone.