Please refer the script to Run Defrag on System Disk& use below procedure to defragment all partitions,
Major steps by procedures:
1. Download Defraggler defragmentation tool
2. Install the tool
3. Trigger defragmentation of using Defraggler command line utility (df.exe)
4. Uninstall the tool
Note:
1. Run the script as "system user"
2. No input requires