I cannot delete clean symbols

I cannot clean one folder. When I use windows explorer and try to delete it,I receive a message "cannot delete symbols - access is denied".

When I use ccleaner, and try to delete the follwing files in the same folder,l

ANALYSIS COMPLETE - (0,120 secs)

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2,40MB to be removed. (Approximate size)

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Details of files to be deleted (Note: No files have been deleted yet)

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I:\restore_24_10_2006\trabalhos\colaboradores\Trabalhos\T652 Emiss?rio Tanger\c.1-?tudes de Stabilit? et R?sistence\C.1.1-Tron?on entre les points PM0 et PM1230\FINAL\Calculos_Agita??o_N10E-Aneis Tipo A_afast_5 e 3,2m\Condi??es Flutuabilidade\AnneauxTypeA(ecart?s 3,2 m).XLS 1,20MB

I:\restore_24_10_2006\trabalhos\colaboradores\Trabalhos\T652 Emiss?rio Tanger\c.1-?tudes de Stabilit? et R?sistence\C.1.1-Tron?on entre les points PM0 et PM1230\FINAL\Calculos_Agita??o_N10E-Aneis Tipo A_afast_5 e 3,2m\Condi??es Flutuabilidade\AnneauxTypeA(ecart?s 5 m).XLS 1,20MB

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it says cleaning complete, 0 bytes removed.

Thanks in advance.