My PDC has an excessive number of hidden folders on the c: drive (root drive) that are named $NTUninstallKB#######. I understand that they are created by updates, service packs, and hotfixes and contain uninstall information in case you need to uninstall any of them. Since a lot are at least 6months old I doubt that I would need to uninstall those particular updates or hotfixes or service packs. This server is running low on disk space and it would free up at least 600MB of desparately needed space.if these files were deleted. Is this a viable option or would deleting those hidden folders cause a problem even if I never uninstall any of the updates, etc.