First I do not use Vista but found this on PC World regarding Windows updates available March 13th
"March 2007 Windows Vista Application Compatibility Update," added compatibility "shims" -- code that makes an application think it's actually running on a pre-Vista PC -- for older Windows titles, including Trend Micro's Internet Security, Windows Server 2003 (SP1) Administration Tools Pack and RealNetworks' RealPlayer 6.0.12.
Hopefully the Windows updates will solve those issues each of you are having

Post back here Please to let us know if the updates fixed it
Found the link that includes a list of programs that the patch covers from Microsofts Knowledge base...
HERE noting that SDC is not listed but the patch may still solve the problem
This update applies to:
• Windows Vista Ultimate
• Windows Vista Starter
• Windows Vista Home Premium
• Windows Vista Home Basic
• Windows Vista Enterprise
• Windows Vista Business
• Windows Vista Ultimate 64-bit edition
• Windows Vista Home Premium 64-bit edition
• Windows Vista Home Basic 64-bit edition
• Windows Vista Enterprise 64-bit edition
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