NEW SCCM Client Uninstall-Reinstallation on 2000+ PCs

[SagarDas]

Hello Members,

There are around 2000+ machines out of 6000 domain workstations; where in windows patches has been failed. All the domain PCs.
Please let me know how can this be fixed so that failed PCs will get software updates. 
Whether SCCM client uninstall & reinstall can fix this. There are around 50% failed machines running on older versions & remaining on new version 5.00.8740.1012.

Let me know quickest & fastest method.

TIA

[GarthMJ]

there is no quick and fast method. without knowing why things aren't working, there isn't a lot anyone can do to help.