When decrypted (shift by -1 in the alphabet, i.e., each letter moved one step back), becomes:
The text: danlwd fyltr shkn qwy sayfwn 5 bray kampywtr wyndwz 7 danlwd fyltr shkn qwy sayfwn 5 bray kampywtr wyndwz 7
Since you wrote danlwd fyltr shkn qwy sayfwn 5 bray kampywtr wyndwz 7 — it looks like it might be at the end ( wyndwz 7 → Windows 7) and bray kampywtr might be "for computer" ( bray → for? kampywtr → computer?). When decrypted (shift by -1 in the alphabet, i
— that doesn't make sense.