Despite the fact that System Writer is missing from "vssadmin list writers", System Restore points are successfully created and non-system file Shadow Copies are also being created. However, the most recent attempt to restore one of these points failed without explanation. Fortunately, I image the partitions weekly with Norton Save & Restore. The other 6 Writers are functioning normally. The following Application Log error is generated every time "vssadmin list writers" is executed on Vista Ultimate. Source: CAPI2 Event ID: 513 Cryptographic Services failed while processing the OnIdentity() call in the System Writer Object. Details: AddCoreCsiFiles : RtlConvertNtFilePathToWin32Path() failed. System Error: 0xC0000039 (unresolvable). %systemdrive%\Windows\Registration ACLs are correct per http://technet2.microsoft.com/windo...7e1c02b6-a223-4d5e-9038-48f0bfced4551033.mspx Thanks in advance.