Overlapped I/O error installing SQL Server 2008 R2 SP2 Express

A user of our software is attempting a normal installation on Windows V8.1 x64 (theoretically completely updated). As part of the install, SQL Server 2008 R2 SP2 is normally installed as the back-end database.

This one user is currently getting an error 997 – Overlapped I/O operations is in progress. The relevant portion of the log file:

MSI (s) (40:90) [09:36:49:634]: SECREPAIR: New Hash Database creation complete.MSI (s) (40:90) [09:36:49:634]: SECREPAIR: Crypt Provider not initialized. Error:0MSI (s) (40:90) [09:36:49:642]: SECREPAIR: Crypt Provider not initialized. Error:0MSI (s) (40:90) [09:36:49:643]: SECREPAIR: Crypt Provider not initialized. Error:0MSI (s) (40:90) [09:36:49:643]: SECREPAIR: Crypt Provider not initialized. Error:0MSI (s) (40:90) [09:36:49:643]: SECREPAIR: Crypt Provider not initialized. Error:0MSI (s) (40:90) [09:36:49:643]: SECREPAIR: Crypt Provider not initialized. Error:997MSI (s) (40:90) [09:36:49:643]: SECUREREPAIR: Failed to CreateContentHash of the file: Program Files\Microsoft SQL Server\100\Setup Bootstrap\SQLServer2008R2\x86\Microsoft.SqlServer.Configuration.SqlBrowserExtension.dll: for computing its hash. Error: 997MSI (s) (40:90) [09:36:49:645]: SECREPAIR: Failed to create hash for the install source filesMSI (s) (40:90) [09:36:49:645]: SECUREREPAIR: SecureRepair Failed. Error code: 3e554415638Action start 9:36:49: ProcessComponents.Error 997. Overlapped I/O operation is in progress.

I have looked into the problems with KB2918614, and this patch is apparently not even installed – at least it doesn’t show up in the list of installed fixes.

I disabled the running antivirus, and the error still occurs.

I did a manual install after downloading a fresh file from Microsoft – error still occurs.

I am now at a bit of a loss. I will continue searching for an answer online, but with all of the experience here – does anyone have any specific suggestions: things to check, things to install, things to disable, random voodoo idols to pray to, whatever.