at System.Security.Cryptography.Utils.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer)
at System.Security.Cryptography.Utils.GetKeyPairHelper(CspAlgorithmType keyType, CspParameters parameters, Boolean randomKeyContainer, Int32 dwKeySize, SafeProvHandle& safeProvHandle, SafeKeyHandle& safeKeyHandle)
… and so on …
In the Security tab of the folder’s Properties:
Click the Owner tab
Ensure the current owner says Administrators, if not, click it in the “Change owner to” box
Check the checkbox that says “Replace owner on subcontainers and objects”
Hit Apply & Ok
On the Permissions Tab
Add the Everyone group (if you haven’t already) by using the Add button, type Everyone, and click OK
Highlight the Everyone group and click Edit
Ensure “Allow” is checked for all the boxes and click OK
Check the box that says “Replace permission entries on all child objects with entries shown here that apply to child objects”
Click Apply, then Yes on the warning to continue
Then click Apply & OK on the MachineKeys Properties window.
This should allow the Excel Calculation Service to start in Central Admin.