Thank you very much for the fast reply. I'll answer your questions in order so as not to confuse responses.

I'll check on restrictions that may have been placed by the previous owners.

I have previously tried to create a new user account, that failed due to password restrictions. I will certainly give that another try very soon.

The FRST loaded and ran nominally, with the exception of the same update fail. I don't know how to interpret the fix results but I believe it ran okay.

The four programs, Bliz, Bliz and the Nortons are programs I have downloaded and installed. I was surprised to notice all of the unsigned files on one of those, is that a typical practice?

Thank you for the info on name collisions, very useful perspective.

I wanted to get the fixlog posted asap but haven't had time to check out the account access issues yet,
I'll work on it this evening and let you know the results in my next reply.

Again, thank you so much for your help not to mention time.

Fix result of Farbar Recovery Scan Tool (x64) Version: 22-04-2022
Ran by Home-Pc (02-05-2022 11:55:31) Run:1
Running from C:\Users\Home-Pc\Desktop
Loaded Profiles: Home & Home-Pc
Boot Mode: Normal
==============================================

fixlist content:
*****************
CloseProcesses:
CreateRestorePoint:
GroupPolicy: Restriction ? <==== ATTENTION
Policies: C:\ProgramData\NTUSER.pol: Restriction <==== ATTENTION
HKLM\SOFTWARE\Policies\Mozilla\Firefox: Restriction <==== ATTENTION
HKLM\SOFTWARE\Policies\Google: Restriction <==== ATTENTION
HKU\S-1-5-21-2199619703-1585671556-87930541-1003\SOFTWARE\Policies\Google: Restriction <==== ATTENTION
S3 nhi; \SystemRoot\System32\drivers\tbt100x.sys [X]
ContextMenuHandlers1: [SDECon32] -> {44176360-2BBF-4EC1-93CE-384B8681A0BC} => -> No File
ContextMenuHandlers1: [SDECon64] -> {44176360-2BBF-4EC1-93CE-384B8681A0BC} => -> No File
ContextMenuHandlers2: [SDECon32] -> {44176360-2BBF-4EC1-93CE-384B8681A0BC} => -> No File
ContextMenuHandlers2: [SDECon64] -> {44176360-2BBF-4EC1-93CE-384B8681A0BC} => -> No File
ContextMenuHandlers6: [SDECon32] -> {44176360-2BBF-4EC1-93CE-384B8681A0BC} => -> No File
ContextMenuHandlers6: [SDECon64] -> {44176360-2BBF-4EC1-93CE-384B8681A0BC} => -> No File
EmptyTemp:
C:\Windows\Temp\*.*
SystemRestore:

*****************

Processes closed successfully.
Restore point was successfully created.
C:\Windows\system32\GroupPolicy\Machine => moved successfully
C:\Windows\system32\GroupPolicy\GPT.ini => moved successfully
C:\ProgramData\NTUSER.pol => moved successfully
HKLM\SOFTWARE\Policies\Mozilla => removed successfully
HKLM\SOFTWARE\Policies\Google => removed successfully
HKU\S-1-5-21-2199619703-1585671556-87930541-1003\SOFTWARE\Policies\Google => removed successfully
HKLM\System\CurrentControlSet\Services\nhi => removed successfully
nhi => service removed successfully
HKLM\Software\Classes\*\ShellEx\ContextMenuHandlers\SDECon32 => removed successfully
HKLM\Software\Classes\*\ShellEx\ContextMenuHandlers\SDECon64 => removed successfully
HKLM\Software\Classes\Drive\ShellEx\ContextMenuHandlers\SDECon32 => removed successfully
HKLM\Software\Classes\Drive\ShellEx\ContextMenuHandlers\SDECon64 => removed successfully
HKLM\Software\Classes\Folder\ShellEx\ContextMenuHandlers\SDECon32 => removed successfully
HKLM\Software\Classes\Folder\ShellEx\ContextMenuHandlers\SDECon64 => removed successfully

=========== "C:\Windows\Temp\*.*" ==========

not found

========= End -> "C:\Windows\Temp\*.*" ========

SystemRestore: => Error: No automatic fix found for this entry.

=========== EmptyTemp: ==========

BITS transfer queue => 1310720 B
DOMStore, IE Recovery, AppCache, Feeds Cache, Thumbcache, IconCache => 225854014 B
Java, Flash, Steam htmlcache => 0 B
Windows/system/drivers => 0 B
Edge => 0 B
Firefox => 52281891 B
Opera => 0 B

Temp, IE cache, history, cookies, recent:
Default => 0 B
ProgramData => 0 B
Public => 0 B
systemprofile => 0 B
systemprofile32 => 0 B
LocalService => 527700 B
NetworkService => 548714 B
Home => 64307295 B
Home-Pc => 66811315 B

RecycleBin => 0 B
EmptyTemp: => 392.6 MB temporary data Removed.

================================


The system needed a reboot.

==== End of Fixlog 11:56:47 ====