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

Hi Peter

Do you have an optical (CD\DVD) drive on your PC?

If so, open Disk Management (accessible by right clicking your Start Button, expand the CD/DVD drive section, what is the Make and exact Model of that drive?

thank you for responding to my question

I do not have any optical drives the key was from scsi ports/scsi targets  and there was a list of dvd and cd and hdd drives none of which matched anything on my system. because of this i made a backup of my system and deleted all the scsi target entries and rebooted my pc. i checked my hdd external scsi drive and it works ok. i just wondered where this scsi target list might have come from. when i see worm in part of a key description i get a little worried. i scanned with microsoft security scanner and i also have webroot secure anywhere running in real time and there were no hits on any scans for malware. having deleted these wierd target list items my computer is still running ok. so i made a new system image backup file .         I  dont think I need a fix just your opinion on what these keys do....my system is win 10 1903 updated ,Hardware: EVGA Z390 FTW main board with Bios overclocking to 5.1Ghz, 32Gb 3200Mhz Ram Intel I9 9900K cpu, Nvidia 2080RTX Ti Ultra Graphics ,Intel Nvme peknw51  478Gb optane memory stick with Intel Rapid Storage Tech.  a Crucial 2Tb SSD  an Hdd 750gb  a Closed Loop cpu Cooler and an EVGA DG-77 RGB case with K-Boost to 4.9Ghz for gaming also a 320Hz Alienware 25 inch monitor with G Sync and a Logitech G910 RGB  keyboard and finally a Logitech G935 7.1 Surround Headset....Power to the Gamer!

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