Hi there and welcome
What is it you will be doing with the new device? Just surfing the internet?
It is important to know what you want to do with the device in order to recommend which one you should use. If for example you said to use company software over a corporate VPN then an iPad would not be helpful.
As it stands, if banking, facebook, emails and the basics is what you wish to do, then an iPad is best. Not only because it stops viruses but its just a lot easier to use and maintain.
The download of the windows 10 upgrade in no way gave you a virus. If this was the case it would be all over the news. Microsoft do not get viruses into their upgrade packages.
If you would like any additional information or assistance, please do not hesitate to let me know.
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