Norton Safe Web is not in the Chrome Store but you can install it using this link

To use bitlocker in Windows Home edition you need to sign in with a Microsoft account.

To determine if Bitlocker is enabled run

manage-bde -status C:

To view Bitlocker key run

manage-bde -protectors -get C:

Open CMD as administrator

Copy the following two lines in to the Command Prompt. For line 2 replace the XXX and yyy with the version of MS Office you want to roll back to that you will find in the link below.

1. cd %programfiles%\Common Files\Microsoft Shared\ClickToRun
2. officec2rclient.exe /update user updatetoversion=16.0.XXXXX.yyyy

https://learn.microsoft.com/en-us/officeupdates/update-history-microsoft365-apps-by-date

3. If you need to disable MS Office updates then open Word, click on File, Account, Update Options and click Disable Updates.

Open PowerShell as Administrator and run the following three (3) commands:

Set-SmbClientConfiguration -EnableInsecureGuestLogons $true -Force
Set-SmbClientConfiguration -RequireSecuritySignature $false -Force
Set-SmbServerConfiguration -RequireSecuritySignature $false -Force