Question:

You want to open a file that you used yesterday in Microsoft Word. Although the file appears in the list of recently used files and you are certain that you saved it, a message saying that it cannot be found appears when you click on the file. You go to the file's storage folder and notice that the file extension has been changed. What is the problem here?

A Your computer has been infected by malware.

explanation

The presence of malware on your computer should be your initial assumption in this case. You would immediately carry out the steps for malware removal. You wouldn't need to reinstall the Word program or Windows. While it's possible that someone has been tricking you, that's not the most likely explanation, unless that person is the one who wrote the malware.

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