Hi, this is probably obvious, but ESET NOD32 is incompatible with PC Tools Spyware Doctor, is that correct?
See this old archived thread that I Googled > https://www.wilderssecurity.com/showthread.php?t=187262
Hmm, that thread is kind of old. I am definitely having serious problems trying to activate both NOD32 and Spyware Doctor at the same time. This is on a fresh install of Vista. If this is supposed to work, something is broken ...
You might browse the forum, if you have not already, some users may be experiencing the same issue as you. In my expereince, Forums are a great tool in finding quick solutions to your product issues. Email to vendor will be ansered, yet swapping emails may take days while posting your issue there instead of here, might get you a faster answer.
Did you check your junkmail, if using Hotmail, Gmail, etc, you need to allow mail never received by you for the first time to be allowed as a rule.