How to: Speed up slow disk defragmentation process.
Solution:
Minimize the 'Fragmentation' window and select the 'Do not show defragmentation process details' option.
1) Do not show defragmentation process details. (The details screen slows down the defragmentation process.)
'Show Details' button
NOTE: If the 'Defragmenting Drive <drive>' window is already displayed, select 'Hide Details' to close it.
'Hide Details' button
2) Minimize the 'Defragmenting' window by clicking the 'Minimize' button.
