what is HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ScsiPort\SpecialTargetList\WormYAMAHA__CDR102__________ doing in my win 10 1903 registry???

By the time the smaller engineering school I attended and worked for gained access, ARPANET was already evolving from its original purpose, but I also had connections with portions of the military, industrial and education complex that was its origins.

The one thing I'd hope you learn is that the registry can't always be "read" and that playing with portions of it is potentially dangerous to the health of your operating system.  Changing or removing portions may cause unexpected damage, since keys or sections such as these may have evolved from their original purpose.

The registry contains many, likely thousands of such remnants, but that still represents a tiny fraction of its entire size and since its a database and not read sequentially, these additional portions cause no true overhead when their integrity is sound.

The problem with removing items is that whether or not the particular keys are required for your specific hardware, they have interconnections that can create unexpected problems when damaged.  So its best to leave them well enough alone, since these problems may not display until later during hardware changes or operating system upgrades, which with Windows 10 occur roughly once every 6 months.

Rob

thank you for your registry advice. I am experimenting to see if removing these bloatware items will cause any side effects. I think since they were targeted for specific legacy  hardware items which are not installed on my system and removing them should not affect my system. I have no legacy or new  cd or dvd drives on my system which is Intel I9 9900k cpu EVGA Z390 ftw motherboard intel optaine memory running as pci nvme 490Gb ,2tb ssd, 750 hdd, 20280RTX Ti Ultra Nvidia graphics, EVGA Closed loop CPU Cooler, EVGA DG-77 RGB Tower, So no legacy hardware is installed and loosing the targeted specific strings should not affect my system because they will never be called for in any program. I did however do a Macrium system Image before removal just in case and another image after the strings were deleted. I am now running with the strings deleted and so far nothing out of the ordinary is happening even when I set the bios to a conservative 4.9Ghz overclock to play games like Dirt Rally 2.0. I delete a whole bunch of windows 10 bloatware on every install and i do keep up with the windows updates . I will let yyou know if i suffer any grief . For me it's simple to launch a macrium reflect image of C:/ which restores the drive including my registry and program files . I keep my 630Gigs of program and games installers on a seperate partition ,D:/ and sync theD:/ archives to my Dell precision 490  file archives   once a week and the Dell has many seperate HDD's so i sync the files again to a second HDD on the Dell once a week then put the second drive offline for safety, I also  keep system images of the C:/ from the dell so I am fully protected and I use webroot internet security complete which has Ai heuristics that dont depend on definition updates to be effective so i have things under  control. thanks for the links to read and replying to my question again....strings deleted so far so good....looking forward to seeing which can of worms gets opened when the windows october o/s opdate arrives