Ok, so I just bought this computer for $40. It was donated to a rescue mission my friend works at, He bought the laptop from the second hand store they have, it is a nice computer but I think something is wrong with it. The guy I bought it from is pretty computer smart. He said it was badly infected when he bought it, he said he cleaned up most of the viruses but its still not working right, he couldn't fix it, so he sold it to me. I was more than happy to buy it for $40. If worse comes to worse its only $40 I lose, but it might be a gem in the rough, and I really need a computer. So anyways he tried fixing it before he sold it to me. I'm not exactly sure what he did to it, but he said it kept giving him security errors when he tried to go to any website, that it kept saying invalid certificate, certificate out of date, etc. or something like that. He said he downloaded programs from this site that he has used before, and he said it got rid of the virus causing the errors, but he said something is still wrong with it.
I just got the computer yesterday. I tried using it and internet works, websites load up no problem, accept they take a long time to load, an extremely long time to load. For the make and model of this computer it should be running a lot faster than what it does. I'm no computer expert, but I am pretty computer smart, and I know with 4g ram, AMD Turion64x2 processor, and a nvidia graphic card Geforce 7150M/ nforce 630M it should run a lot smoother and faster than what it does. I tried running a program he had on here called Rkill, just to see what happened. And it said no malware detected, but then it said C:\Windows\syswow64\UTSCSI.EXE stopped or killed and it was wd-heur. So im pretty sure there is something still on here that the guy I bought it from missed, plus it runs extremely slow, I know its not a brand new computer, but its not a piece of junk either, and this thing is running super slow. Any help you guys can give me would be very much appreciated. He left all the programs on the computer, I see Rkill, Combofix, Junkware Removal Tool, Adware Cleaner, and malwarebytes, on here, plus the antiviruse which is Kaspersky. So I know he did try to remove whatever it was on here. Im just not sure what exactly to do with these programs and dont want to mess anything up, so decided id come here and ask you guys. Like I said I just got the computer from him, so I would like to try to fix it up so I can have a good computer to use. Thank you for your help and your time. Lead the way and let me know what I need to do and I will do it. I work full time, but will respond back as soon as possible. Thank You again for your help.