If you get a call from someone claiming to be an IT professional wanting access to your computer remotely and you don't know them, hang up. Over the past year there have been a lot of scam cold callers offering to clean up viruses on your computer or checking your computer for scams. Just like real IT professionals they get you to download software so they have control of your computer.
Most genuine IT companies do not make cold calls offering to clean your computer. New Zealand Computing Solutions (NZCS) certainly would never do this. You approach us and we might remote into your computer but please don't give access to anyone you do not know. Be wary of them, they will try and gain trust through socially engineering. They might offering up information that could be true or is able to be found online through social media sites.
Don't fall for it.