What is it?
SPOOLer SerVice - spoolsv.exe

What does it do?
spoolsv.exe - The spooler service is responsible for managing spooled print/fax jobs

You will be able to end this through task manager!

More info

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Virus Precaution:
The spoolsv.exe which is from Microsoft is located at c:windowsSystem32spoolsv.exe . We've been able to find several viruses that run as spoolsv to trick you.

Backdoor.Ciadoor.B - Symantec Corporation
Hacktool.Privshell - Symantec Corporation
VBS.Masscal.Worm (vbs) - Symantec Corporation
Graybird-A @ Sophos