Based on the configuration you've mentioned, it appears the Boot Manager reads from the "System Reserved" partition which contains essential boot files like BCD (Boot Configuration Data). Meanwhile, your active Windows 10 installation is likely on drive C: as its status is "boot", suggesting it's where Windows loads from.
To understand the different statuses, here's a simplified description:
- Active: This is the main partition that your PC’s BIOS looks for (and boots from) when the computer starts up. The partition marked as Active must contain boot files (i.e., the Boot Manager).
- System: This is the partition where the boot files are stored. The boot partition will contain the Windows and Boot Manager folders.
- Boot: This label means that there is a Windows OS installed in this partition, and the current running OS is in this partition.
In this case, you seem to have multiple partitions set as 'active', which isn't typically necessary and can sometimes result in boot conflicts or errors.
As for your D: drive or disk 2, if it's intended to be primarily for data and doesn't contain a Windows directory, its status being active may simply be due to improper configuration, rather than a sign of another OS installation. The status of being active can be changed to match its intended use as a data drive.
Concerning the second Windows version you mentioned: If the OS was previously installed in another partition and that partition isn't present or correctly configured anymore, you might get a winload.exe missing or not found error even if the file does exist in C:\Windows. This may happen for instance if the boot configuration is corrupt or isn't accurately pointing to where the actual OS files are.
The currently running Windows shouldn't be installed on drive D: as you mentioned there is no Windows directory there. It is instead installed and running from your C: drive, which is also where it boots from since the C: partition status is marked as 'boot'.
To resolve and clean up your PC configuration:
1. Make sure your essential data is backed up.
2. It may be best to remove the unused second Windows installation from your boot manager.
3. Change the boot status of your D: Drive if it's solely intended for data storage.
These changes should be done carefully or with assistance from an expert or knowledgeable friend to avoid potential data loss or rendering your system unbootable.