Optimize fails at cookies index.dat

I am using WebRoot SecureAnywhere version 9.0.13.62 on a Lenovo T520 running Windows 10. Every time that I select Optimize it runs like everything is fine until it gets to C:ProgramDataMicrosoftWindowsCookiesindex.dat and then the optimize screen will suddenly close. I never get the confirmation window and status, but just goes back to the WebRoot SecureAnywhere window.
 
I found that the file noted didn't exist, so I created the Cookies Directory, and made an empty index.dat file. Still it dies there.
 
I have tried to find logs to point to a problem but the scan logs are completely useless. I have also looked in Windows Event Viewer which is also not proving helpful.
 
My question is two fold: Has anyone seen this or a similar issue before (and hopefully can provide a resolution), or can anyone point me to logs for the Optimize function?
 
Thanks.