Caller said someone was trying to hack my computer and claimed to be working for a company in California. Phone number is associated with Semantic Infotec... sounds like they're drycalling for business.
If only you had included a grammar and spelling checker.
There are a number of reputable and well known anti-malware vendors. You are not among them. In any case, in today's threat environment Firefox w/NoScript, and OpenDNS, which are free, are more valuable measures than any anti-malware - especially fake ones.