Dear Reiza: I purchased GSC months ago, have not reconfigured my PC since. Periodically, when attempting to start GSC I get the deactivation window asking me to either purchase the sim or enter my serial number. Normally, I am able to enter my serial number and go on my way, but after entering my serial number earlier today I get the message "Connection to CheckPoint server has failed. Please contact your vendor for assistance." Obviously I have a good internet connection or I wouldn't be writing this... Reiza, You have created one of the best sims ever. I understand the need to copy protect the sim, but this is getting out of hand. Please get this fixed. It is VERY frustrating to your customers. And yes, I have emailed firstname.lastname@example.org, but have not received any response as of yet. ARRRRGH!