Scenario: a Paragon program shows some of your partitions in red; instead of filesystem or unallocated space, they’re marked as “Invalid”
This typically results from incorrect geometry. You need to fix it by slightly resizing partitions with Windows Disk Management:
Now partition geometry should be correct.
After these operations, the partitions should show up correctly and be operable. It should be noted that partition shrink is only available in WDM starting with Windows Vista. In earlier versions of Windows, you need different tools.