Window 2008 print Spooler service keeps freezing

Hi

We have windows 2008 Print servers In the last  3 months we had 10 occassions  where users reporting that they cant print. I noticed that the spooler service on the  print server had stopped . On all occassions  i went to the following directory and  manually deleted the print jobs and restatred the spooler service and the users were able to send the print  without any problems. I also checked the size of the spooler files that were waiting and they were 7mb.

 %SystemRoot%\SYSTEM32\SPOOL\PRINTERS

I checked the eventviewer and i had the following logs.Any idea as why the spooler size keeps freezing.

Log Name: System
Source: LsaSrv
Event:6037

The program svchost.exe, with the assigned process ID 1748, could not authenticate locally by using the target name HOST/.. The target name used is not valid. A target name should refer to one of the local computer names, for example, the DNS host name.
 Try a different target name.


Log Name: Application
Source: Application Error
Event:1000

Faulting application name: spoolsv.exe, version: 6.1.7601.17777, time stamp: 0x4f35fc1d
Faulting module name: ntdll.dll, version: 6.1.7601.17725, time stamp: 0x4ec4aa8e
Exception code: 0xc0000374
Fault offset: 0x00000000000c40f2
Faulting process id: 0x570
Faulting application start time: 0x01cdb77984a5ccf0
Faulting application path: C:\Windows\System32\spoolsv.exe
Faulting module path: C:\Windows\SYSTEM32\ntdll.dll
Report Id: 34002b4a-2732-11e2-a303-00237dd92742


Log Name: System
Source: Service Control Manger
Event:7031
The Print Spooler service terminated unexpectedly.  It has done this 1 time(s).  The following corrective action will be taken in 60000 milliseconds: Restart the service.

Thanks