URGENT: Error 7

Hi,

I' ve on a single PC the following error, I've already reistalled, but the error persist.

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Errorprotocol
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PDFCreator  - Error message
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ERROR DESCRIPTION:
          Error-Nr:    7 (Memoria esaurita)
          Modul:    frmMain
          Procedure:    CheckPrintJobs
          Line:         50090
          Date/Time:    07-21-2010 / 10:57:34
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CALLSTACK:
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SYSTEMINFO:
 Windows XP 5.1 Build 2600 (Service Pack 2)
  [TerminalServer WinXP WinXPProEdition WinXPSP2]
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it's 0.9.3 version and can't be upgraded.

What can I do? Others PCs work just fine.