Was there at some time a Lexmark printer installed on the PC?
LexBceS is a reference to Lexmark MarkVision.
If you have exported the registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Spooler (export by clicking on the key "Spooler", go to file, click on "export", and save with the "File Name" Spooler. I have created a folder in the My Documents folder called "Regedit Backups" where I save exported registry keys).
Go ahead and change the data value to just RPCSS and reboot. If something should go wrong and I don't think it will, you can go to where you saved the Spooler key and return it to the registry.
Leftover registry entries from printer uninstalls can interfere with the Spooler Service.
If you don't already have CCleaner installed on your computer, you may want to download and install the program.
Download here: http://www.ccleaner.com/download/
Run CCleaner and click on "Issues". This will scan your registry for any problems. Delete any entries that pertain to Lexmark printer. Before you delete any registry entries, CCleaner will ask you if you want to backup the deletions, click "Yes".
You should be able to start the Spooler Service and install your printer.