having a weird problem... I am running exchange 5.5 sp4 and our information store is around 16 GB running on a windows 2000 server sp3.. everything was cool unitl about 2 weeks ago. I have maintenance running on the DB's at 4 am.. everything runs great but the process store.exe hammers the processor at 100% after the maintenance is over and eventually grinds my server to a halt(about every 24 hours)and I have to reboot(which sucks) I have run and ISINTEG on both the priv and pub with the -FIX -TEST ALLTESTS switches and came up with a few errors.. nothing major, but still after maintenance runs store.exe won't let go of the processor, I have also re-installed sp4 but get the same thing... has anyone seen this before??