ccsvchst.exe completely takes over the CPU

My wife and I have separate computers with Norton Internet Security installed. 
We have approximately 90 days left on our subscription and have really not
experienced any problems with Norton until recently and then only on my wifes computer. 
The process ccsvchst.exe completely takes over the CPU and the computer becomes unusable.

I have tried all that was suggested in this message thread with no success in alleviating the problem.
The computer is a generic home build with the version of Windows and Norton Internet Security
shown below.  Any assistance you can offer will be appreciated.

RLM

Microsoft Windows XP
Home Edition
Version 2002
Intel Celeron(R) CPU 2.66Hz
1.50 GB Ram

Norton Internet Security
Version 18.6.0.29

On Saturday 6/18 I ran Process Explorer with the results shown below.

3280    84    291    MSVCR90.dll!endthreadex+0x6f

ntoskrnl.exe!ExReleaseResourceLite+0x1a3
ntoskrnl.exe!PsGetContextThread+0x329
ntoskrnl.exe!FsRtlInitializeFileLock+0x83f
hal.dll!HalClearSoftwareInterrupt+0x341
DSCli.dll+0x1fc27
DSCli.dll+0x193d2
DSCli.dll+0x23630
DSCli.dll+0x20260
DSCli.dll+0x202f2
DSCli.dll+0xc8bd
NCW.DLL!GetFactory+0x2bb7f
NCW.DLL!GetFactory+0x6f213
NCW.DLL!GetFactory+0x6ea79
NCW.DLL!GetFactory+0x6e4ec
NCW.DLL!GetFactory+0x6de0d
NCW.DLL!GetFactory+0x5ab54
NCW.DLL!GetFactory+0x20bb7d


On Friday 6/17 I ran Process Explorer with the results as shown below.

3312    82    275    MSVCR90.dll!endthreadex+0x6f

ntoskrnl.exe+0x47f3
ntoskrnl.exe!PsGetContextThread+0x329
ntoskrnl.exe!FsRtlInitializeFileLock+0x83f
hal.dll+0x2c35
DSCli.dll+0x21fe0
DSCli.dll+0x20260
DSCli.dll+0x202f2
DSCli.dll+0xc8bd
NCW.DLL!GetFactory+0x2bb7f
NCW.DLL!GetFactory+0x6f213
NCW.DLL!GetFactory+0x6ea79
NCW.DLL!GetFactory+0x6e4ec
NCW.DLL!GetFactory+0x6de0d
NCW.DLL!GetFactory+0x5ab54
NCW.DLL!GetFactory+0x20bb7d