They constantly call here in the UK too. They want access to your computer to 'fix' a problem, but will actually install some malware, and will then charge you to 'fix' it. If you don't pay, you won't be able to use your computer! Microsoft, Apple etc NEVER telephone you to 'fix' your computer. This is a scam to get you to hand over your hard earned money to criminals.
I like @Pudge's response to them. Best to hang up, don't engage with them, or, to buy a call blocker. Lots of elderly people in the UK have been plagued by these calls, and some of them have had lots of money stolen. Some charities for elder care have been helping with this. But, also there has been some nuisance calls from 'companies' charging huge amounts for these call blockers. We now know to be aware of these too!
I think so long as there is plenty of information out there about these spam calls, and not to be frightened of informing the police if you have been a victim, and to pass on warnings to others, we will be safer.