- OS. 2.0.2 to OS. 1.5.0 (ect)
- OS. 2.0.2 to OS. 1.6.0 (ect)
After installing 2.0.2, Do not install OS 1.5 ... or 1.6 ... I installed both systems, and my Kronos 'died' (twice

A prompt appeared on the screen: The system cannot start due to a file system error. Please reinstall the system software.
I Used the "Full Install" option - reinstalling the system from the DVDs? The function does the following:
- Restores the system software on the internal hard drive
- Initializes the internal memory, and re‐loads the original factory preload data–including all Programs, Combinations, Drum Kits, Wave Sequences, and Global settings
- Erases all files inside the internal hard drive’s FACTORY directory, and then restores the factory preload files, including the PRELOAD.PCG file and the demo sequences (leaves all other data on the disk intact).
Summary:
1. Time (Full Install): 40 minutes (DVD1) + 8 minutes (DVD2)
2. Result: the Kronos is alive – OS. 1.0.1!
3. Level of aggression:

Then, I re-installed the system: 2.0.2. Operation time: 2 minutes. Everything works!