I got hacked by malware service on window please help me

In Summary :

A few years ago I noticed my beloved ex laptop with A great space ram and everything else getting slowed down. I was a newbie but my instinct told me it's hacked.It was a service-based malware that runs whenever the pc runs too. It has deleted my user permission and added their user group and permissions as well to my pc.I have decided to step up and do something..it's my pc after all. I tried to locate the place of there server through the services and I was able to locate a few of them. However I am bored with the message access denied or the infamous "need permissions" to just delete their files off my pc. It is more infectious than HIV ( if we're able to compare ) as it is infectious after the 1st contact with any removable , where it goes totally undetected. You could only detect it after getting infected where you would be able to shut your eyes off the data that continue screaming at you saying " your pc is mine" by the gpu usage ram usage and even HDD Occupation. Other than that they use and override office services(Click to run) ..Netflix , Nvidia's cuda and update services ,along with sound capture (Realtek) and screen capture "smartscreen" [I'm just naming a few services that got my mind boggling over the past few years].I got one day so angry I tried to shut down their services manually However, they have studied and prepared everything. They have inherited permissions that renders my trials useless as their services inherit each other plus they have the ability to reproduce and reopen whenever I close them whike the Boss service keeps telling me Access denied. The irony is after closing a few of their services off my screen got manipulated! Whenever I open a folder .. the files names got (seemingly)erased and even the contents of a few of my other files got tampered besides the increase slow run of my ex laptop made me just frustrated by this daunting and never ending misery.Now I am using a laptop however I needed a few files my CV,and code programmed before thus I had to open the HDD that I once connected with my old one. And you know the rest. The symptoms of the deadly service based malware is back..and I got new news for you fellas.. remember the 99 do I usage I mentioned before now it's completely gone as the gpu usage number is manipulated too and it remains 7% whenever I take a look at it.Guys, How can I best this legendary beast that has been with me for years now? I really want to shut every thing but also there seemed to be lots of useful code that I can learn from too so that I could be as the same level of my predators at the aftermath (fingers crossed)[...]

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