Have you ever encountered a strange file with an NTUSER.DAT name on your Windows PC? Don't worry, it's not a virus, but quite an important file. In this article, we'll explain what it is and why you ...

A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Lea Uradu, J.D., is a Maryland state registered tax preparer, state-certified notary public, ...