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You attempt to install software in Windows; and although you are logged on with a computer administrator type of account, your screen turns grey and you receive a message asking if you want to allow the program to make changes to the computer. What Windows feature is at work here?
Unknown Substance
A material or compound whose identity, composition, or properties have not been determined.
Chemical Reaction
A process that involves rearrangement of the molecular or ionic structure of a substance, unlike a physical change that affects its physical properties only.
Products
Substances formed as a result of a chemical reaction.
Chemical Equation
A written representation of a chemical reaction, showing the reactants and products with their respective quantities.
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