Upgraded from 4.0.437 to 4.0.474 and now when booting, at the login screen the PC is non-responsive. The mouse works...but keyboard does nothing and I can't ping the machine. If I disable Windows Search 4.0 in the services...PC boots fine. If I uninstall 4.0.474 and reinstall 4.0.437 it works fine with Windows Search. Reinstall 4.0.474...PC locks up. I've excluded the indexing folder to no avail and also did a rebuild of the index. Anything else I can try? I've only tested on 2 machines so far...one works fine and the other locks up. Both are XP Sp3 with the latest MS patches.