Trying to correct error messages. Administrator access denied and AcceleratorST.exe download

[Bunny-75]

• Need help. My Notebook may be hacked, but I am trying to recover the use of my system. The laptop operates without me. Recently, I received the message that access to my Microsoft account as administrator is denied (I have 3 email addresses.) Eventually, the page changes and I can sign in using my password.  Next, an error message says I need to install the system AcceleratorST.exe to access the VCRUNTIme.dll program which I must install. I googled for instructions to fix these errors and thought it was resolved. A very long story short, the problem persists and when the desktop is loaded the computer screen will begin to load programs as if on "automatic pilot." Am I fighting a losing battle or can it be fixed? I'm surprised it has not prevented me from writing this message. This is a very unusual experience for a 75-year-old brain to tackle. I'm exhausted and at wits end. I hope you can help me. 
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[Garp_senchau · Accepted solution]

@Bunny-75, Welcome to HP Support Community,

Thank you for posting your query; I’m here to help by guiding you through steps to resolve this issue

Disconnect from the Internet

Unplug your Ethernet cable (if plugged in).

Turn off Wi-Fi (click the network icon in the corner and disable it).

Start in Safe Mode

Turn off your computer.

Turn on your computer and repeatedly press the esc key until the Startup Menu opens.

To begin a system recovery, press f11.

Choose:

Troubleshoot

Advanced options

Startup Settings

Then click Restart

Press F5 to choose Safe Mode with Networking.

Remove Strange Programs

Press Ctrl + Shift + Esc to open Task Manager.

Go to the Startup tab.

Disable anything that looks strange or unfamiliar.

Also, go to Control Panel > Programs and uninstall anything suspicious.

Fix Your Microsoft Account

On a safe device (like your phone or another computer), go to:
👉 account.microsoft.com

Sign in with all your Microsoft email addresses.

Change your passwords.

Turn on Two-Step Verification (extra security).

Check for suspicious activity.

I hope this helps.

Please feel free to reply here if you have any questions or if you need further clarification on any of the steps. 

Take care and have a good day. 

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Regards,