Spooler SubSystem App errors

Moved from Malware forum. LDT

My wife's notebook has been showing a list of Spooler SubSystem App errors when she boots.

She is using Windows Vista Home Premium.

The notebook came preloaded with Bullguard security suite. She ran a full scan and found only three infections in cookies which she fixed (cookies deleted). When I checked her settings, I found that the Windows firewall was enabled and the Bullguard firewall was disabled. (I'm not familiar with Vista, but in XP I would have disabled the Windows Firewall and enabled the Bullguard firewall as I understood that the XP firewall was checking inbound traffic only.)

The error list that came offered to view details on the Spooler error instances. Here is the detail from one of the error instances:
Product
Spooler SubSystem App

Problem
Stopped working

Date
9/02/2009 4:52 PM

Status
Not Reported

Problem signature
Problem Event Name: BEX
Application Name: spoolsv.exe
Application Version: 6.0.6001.18000
Application Timestamp: 4791956c
Fault Module Name: lxdeptpc.dll
Fault Module Version: 0.190.0.0
Fault Module Timestamp: 464a8c78
Exception Offset: 0006f61c
Exception Code: c000000d
Exception Data: 00000000
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 3081
Additional Information 1: 0725
Additional Information 2: 7d1644e1e1ad0f8a59bde3485e303430
Additional Information 3: ba85
Additional Information 4: 25ef00441f8c1bfac3a0bf87a8ca4fb5

Files that help describe the problem
SpoolerETW.etl
Version.txt
AppCompat.txt
memory.hdmp
minidump.mdmp

Can you advise if this the result of an infection or how we can stop the Spooler errors occurring, please?

The module causing problems, as your post says is lxdeptpc.dll. THe spooler errors are usually printer related, and files that have a name starting with LX are usually Lexmark printer drivers. However, I can find next to no reference data on this filename.

If I had to bet, I would say that you have a Lexmark printer installed? If this is the case, you need to unplug the Lexmark printer, uninstall all Lexmark related software from add/remove programs, and delete any Lexmark printers listed in control panel -> printers. Reboot the computer and see if the problem persists. Probably not. Now, download/install the newest Lexmark software directly from the Lexmark website. Your problem will probably be solved.

If you are using a 64-bit version of Vista make sure you are using 64-bit printer drivers. Control panel -> system will tell you what version if it is 32 or 64 bit. 64-bit versions of windows and printers still don't play nice together.