Computer Was Hijacked, System Partition Mess, 72 Could Use Some Help Please.

I am a 72-year-old disabled senior with early onset dementia. 4 days ago yahoo took over google as my search engine without me knowing what happened. A day later my Total AV stopped working and Windows Defender took over. My computer is a 3-year-old Dell Desktop XPS8940. It was a year old when a friend gave it to me. Windows needed to be updated. I have been trying to update it for 2 days now. I keep getting this error message "couldn't update system reserved partition" I looked it up; however, I cannot figure out how to fix this. Then another site said it meant my computer was dying?
I am going to have 3 surgeries in the next 3 months, and I really need my computer to work. So I can get to my my chart, write emails, check my mail, etc., oh, and go on Facebook. All my family has passed except for a brother that lives in OKC and he is very sick. I live alone in an apartment. When I went to the first forum it said to try Malwarebytes- It would not install. Window defender is not finding anything, and I can't get my total AV to install.
It won't take me back to a system restore point before this all happened. Using Win 11.
I am not sure what to do and what would be the next step. I can't afford at this time to buy another computer so I am really praying this can be fixed. Thank you for taking the time to read this, I am grateful.

 

When I tried in MS Edge it said we don't know this is it safe. Then I hit save and it made me go to a page that said =
Make sure you trust FRST64 (1).exe before you open it
Microsoft Defender SmartScreen couldn't verify if this file is safe because it isn't commonly downloaded. Make sure you trust the file you're downloading or its source before you open it.


Name: FRST64 (1).exe
Publisher: Unknown So them I clicked keep anyway. Then I tried Chrome it said
Windows protected your PC
Microsoft Defender SmartScreen prevented an unrecognized app from starting. Running this app might put your PC at risk.
More info I can't get Defender to shut off so I can try to download it.

 

Thank you. I tried to download it. Chrome and FF said-
Microsoft Defender SmartScreen prevented an unrecognized app from starting. Running this app might put your PC at risk.
More info I can't turn Defender off I have tried for two days. I am attaching screen shots for each browser. If I can't get Defender to shut down I can't install anything. I tried to screen shot what I did. I am at a loss. Thank you for your help I am grateful

 

I finally found a way to get it to run... I hope I did this properly. Thank you for your help

 

Thank you very much. Just returned from the hospital so I am going to rest for a while and then start on the tasks you gave me to do. I am so so grateful. Thank you, if I get confused or overwhelmed, I will ask for help. Grateful

 

I'm Ok, they just have to do tests before I have surgery and before they start me on the dementia medicine.
Thank you! I just finished I hope I did it right. Windows still won't update. It gets to 8% and then I get the partition message. Every item I had to uninstall gave me trouble. I just kept trying until I figured out a way to fix one problem at a time. Thank you for your help I am grateful. I hope we can get this working. I am leaving for now Defender it won't uninstall, and I don't want to mess with it until we fix this and until Windows updates it's been almost a week now. Again, thank you very much.

 

Forgot to add this one was able to make it work today.

 

Yes, I could change it to Google or Duck Duck Goose. I can't download Total AV ( not sure if I can keep it even if I could because I paid for it for a year. Can't uninstall Defender and still cannot update.
I will go to your message and respond. My computer is acting wiggy so I will try to do this after I do a few things on the computer. Thank you very much for your support and understanding how challenging this is for me. Thank you

 

PS FRST64 still cannot download - Window defender is still blocking it, same as Total AV, and Window update this is a mess

 

Thank you! I can't seem to get around the warning on Total AV and FRST64. Hoping there is a way.

 

Ok, I tried. I could not get it to run as Admin. Let me know if it's OK.
I will check back later tonight. Needing to take meds and rest for a while.
I used to love doing this, now, it's challenging. Thank you!

 

I think this was run by admin.

 

OK, I will try again.. So, close, but that only counts in horse shoes... ( Sorry I could not resist) I tried it said... NO FixList.txt. Sigh.

 

Terrible, I think I have the flu and the computer is all wiggy since I tried to connect it to the printer. I have the flu I am now on Cox, 300 instead of the 100 I was on with Visible. I am hoping this computer is not dying. It was working fine... Its very slow when I get to an website it takes longer now for the pictures to show up. I am not sure if I am making sense. I was talking to my surgeon and the problem started again. I don't know where the problem is, the computer, the phone, etc. Or both. When I attached the printer... suddenly in the top right of the computer was a ghost symbol of a sound icon. The file is what it looked like only it was much bigger and flashing and not solid. I will write more tomorrow. I don't feel well. Thank you very much for helping me. PS this is from the speed test -
DOWNLOAD Mbps
346.87
UPLOAD Mbps
34.20
Ping ms 14 25 27

 

TY, I will try that ...

 

completely unrelated but I love your PFP, looks just like my best freinds pitbull we call papsmear