Rhino open file very slow

I have a problem with workstation of my costumer.
When he open a file of 250 mb, Rhyno open the file very slowly and appear “Not responding”.
In another pc with less ram the file open faster.
I have try to remove and reinstall Rhyno, i have delete and recreate the user profile of Windows but nothing to do.

Hello - please ask the customer to run SystemInfo in Rhino and send us the result.

-Pascal