Unable to decrypt request parameters Error message

Discussion created by timdine on Jan 11, 2013
Latest reply on Jan 17, 2020 by LOGOSSADECV
I uninstalled and tried to reinstall ArcGIS Server 10.1.  On reinstallation I reached the create site option.  I didn't have a useful site on the server, but the folders from a previous attempt were still on the server (c:\arcgisserver\directories c:\arcgisserver\config-store).  When I attempted to create a new site it failed with "Unable to decrypt request parameters".  Deleting the folders then creating the new site solved the issue. 

I didn't see the error message on the forum so here is is with a quick solution.