Does anyone know how to change the Cluster Size on a hard drive without reformatting? I have a customers PC with Win98SE and it is on a 20gb hard drive. It is already set up for Fat32, but the cluster size is 4KB instead of the 16KB it should be. So with this issue the customer can not run scandisk or defrag on the hard drive. It gives the message "Your computer does not have enough free memory to defragment this hard drive" I looked at Microsoft and Article 229154 talks about it. But no real resolution. Thanks for the help.