# cmd > attrib - Unable to change attribute

I'm following this tutorial because I'm having problems with the Task Scheduler service:

Basically (in case the link dies), it says that you should go to C:\Documents and Settings\All Users\Application Data\Microsoft\Crypto\RSA\S-1-5-18 and delete everything that's in there.

Here's the problem I'm having - there is a single file, marked as hidden, system and read-only. The file name is "d42cc0c3858a58db2db37658219e6400_46884bcb-8fba-461e-a2ee-e996218ba78a".
When I try to delete it, I get the following message:
Cannot delete X : Make sure you specifiy the correct path

The file is definitely there, as I can browse to it via Windows Explorer. I assumed that the problem is the "system" attribute. I ran
attrib -s "path\to\the\file"

and the output:
Unable to change attribute - "path\to\the\file"

When I try to remove the hidden or read-only attributes instead, I get:
Not resetting system file - "path\to\the\file"

Once again, this is a file, not a folder.
Any ideas greatly appreciated!

PS: OS is Windows Server 2003 r2 x64

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Did you try "attrib -s -h <file>" or "attrib -s -h -r <file>"? What is the output of "cacls <file>" (do you have enough rights on the file)? –  Werner Henze May 27 '13 at 11:21
"attrib -s -h <file>" or "attrib -s -h -r <file>" both produce the second error "Not resetting system file". I am certain that the account we're using has enough privileges to perform the operation. I have no idea what else may be wrong.. –  Kaloyan Doichinov May 27 '13 at 13:07
"I am certain that the account we're using has enough privileges to perform the operation." I am not. Therefore I asked for cacls output. –  Werner Henze May 27 '13 at 13:27