Newly restored Windows 8.1 64 bit w/ high CPU / RAM usage

NoviceTech

New Member
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I have a Toshiba Satellite laptop that's only a couple years old. It came pre-installed with Windows 8. After I upgraded to Windows 8.1 it started having difficulties in certain areas, mainly the File History. It wasn't anything too troublesome, so after a while I let it go. I upgraded to Windows 10 and things got hanky. Everything started moving S-L-O-W. EVERYTHING. CPU usage was often at 98-99% and Memory was up there as well. I eventually restored it back to factory defaults, however that did not correct the issue. As of today, I cannot connect the machine to the internet.
:sarc:
I've noticed that there is a csrss.exe running on Services as well as Console. I've also found that there is a csrss.exe.mui tucked away in there somewhere. Likewise there's a csrss.exe.mui in the old windows files (which I'm not able to delete for some odd reason). I'm not sure if that's my problem or not, but most everything I find online indicates I need to download some program in order to locate any potential Trojan or other viruses / malware. Without having access to the internet on that PC, it's proving difficult to isolate the cause of my issue.
:mad:
Can someone give me some command prompts or search suggestions?
:cry:
Oh, FYI the system has a 500GB HD and 4GB RAM, however that was never an issue before... and, considering it's been restored to factory defaults, I'd assume it shouldn't have any now. :(
 

My Computer

System One

  • OS
    Windows 8.1
Hi NoviceTech,

Welcome to the 8forums.

Please make a screenshot of the CPU and memory usage of taskmanager and post it so we can identify what is taking the resources.
 

My Computer

System One

  • OS
    Windows 10 Pro
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Custom build
    CPU
    i5-6500 @3.20GHz
    Motherboard
    Gigabyte B150-HD3P-CF
    Memory
    16GB DDR4 2133 Crucial Ballistix Sport LT
    Graphics Card(s)
    MSI GeForce GTX 1060 GAMING X 6G
    Sound Card
    Built-in
    Monitor(s) Displays
    Liyama ProLite XB2483HSU-B2
    Screen Resolution
    1920 x 1080
    Hard Drives
    Crucial MX200 500GB & Toshiba DT01ACA300 3TB
    PSU
    Corsair RM550x
    Case
    Fractal Design Define S
    Cooling
    Cooler Master TX3 i
    Keyboard
    Func KB-460 (MX Red)
    Mouse
    Corsair Gaming M65 RGB
    Browser
    Google Chrome
    Antivirus
    Bitdefender Total Security 2017 + MBAM Pro + MBAE Pro
    Other Info
    Creative Sound Blaster Tactic3D Rage V2 headset
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