Ok.
If you have AMD A64 processor then try to disable Cool&quiet function in Bios.
Not run your graphic card overcloked and check if its not overheating.Nice program for background monitoring of tempretures is included in
Rivatuner - works for most X1800-X19xx , NVIDIA 6xxx,7xxx,8xxx series of graphic cards.Monitor CPU temps too.Rivatuner can do it as well.You can donwload it at
http://www.guru3d.com
Shutdown following aplications in windows/taskmanager as they are not necessary for WindowsXP.You can revert it later back.
Shutdown NOD32 antivirus.It sometimes download automatically updates itself in backgrounds or it check HD in background as well(nod32krn.exe,nod32kui.exe)
Not sure what the following files are but they are not part of windows so shutdown them too before you play LFS:
TMTMTSR.exe,FxSvr2.exe,LVCOMSX.EXE,mDNSResponder.exe,raysat_3dsmax.exe,AdskScRV.exe.
alg.exe is for automatical downloads service of windows so try to shutdown it as well.
Please let us know if it helped or not.Please also run the monitoring program in background as and check after you quit LFS if the temps were not too high during the playing of LFS.