How to clear the memory on a Samsung ML-2855ND?

So, when I entered net stop spooler,

the reply was access is denied.

Now What? So, when I entered net stop spooler, the reply was access is denied. Now What?

try a restart and then delete,
or
There are a number of reasons that this can happen, but it usually means that you're having trouble authenticating with the print server. Check the following:

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Right-click the printer on the print server, click Properties, click the Security tab and confirm that the appropriate user accounts have the Print permission. In a home environment where printer security isn't important, this probably means that the Everyone group should have Print permissions. When in a home networking environment, you can also try logging on to the client computer using an administrator account that has the same name and password as an administrator account on the print server.
*
Confirm that you can access shared folders on the print server. If you cannot, troubleshoot file sharing (hint: you might need to enable File and Printer Sharing, and enable the File and Printer sharing in the Windows Firewall).
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If you continue to have trouble, use the following procedure to add the printer using a local port.
1.
Open the Printers folder on the client computer from which you want to print, right-click a blank part of the window, click Run as administrator try a restart and then delete, or There are a number of reasons that this can happen, but it usually means that you're having trouble authenticating with the print server. Check the following: * Right-click the printer on the print server, click Properties, click the Security tab and confirm that the appropriate user accounts have the Print permission. In a home environment where printer security isn't important, this probably means that the Everyone group should have Print permissions. When in a home networking environment, you can also try logging on to the client computer using an administrator account that has the same name and password as an administrator account on the print server. * Confirm that you can access shared folders on the print server. If you cannot, troubleshoot file sharing (hint: you might need to enable File and Printer Sharing, and enable the File and Printer sharing in the Windows Firewall). * If you continue to have trouble, use the following procedure to add the printer using a local port. 1. Open the Printers folder on the client computer from which you want to print, right-click a blank part of the window, click Run as administrator