kan ikke komme ind i mine mapper

Hej alle

Jeg har fået et stor problem. når jeg vil ind i mine
mapper på c drevet får jeg denne besked.

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Jeg har prøvet at se under "sikkerhed" om jeg har adgang og det virker sådan ! det er pludslig sket fra den en dag til den anden dag ???

Nogle der har en ide om hvad der er gået galt ?