Slow PC

Hi
My PC seems to have slowed down to some extent, gradually since loading Windows 10. (It used to be Windows 7).
I tried to run FARBAR - but I got "This app can't run on your PC". I've had this on quite a few downloads recently.
It seems to take a long time to connect to the internet (I'm using Firefox). I've got Sky fibre running at 25mbps+.
I've got a SSD but the hard drive seems to make a lot of noise like it's reading/writing a lot. Although it isn't now.
Below is the system summary - can someone advise please?
Thanks.
OS Name Microsoft Windows 10 Home
Version 10.0.10240 Build 10240
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name STUDY-7
System Manufacturer System manufacturer
System Model System Product Name
System Type x64-based PC
System SKU To Be Filled By O.E.M.
Processor AMD Athlon(tm) II X4 630 Processor, 2800 Mhz, 4 Core(s), 4 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. 0316, 22-Dec-09
SMBIOS Version 2.5
Embedded Controller Version 255.255
BIOS Mode Legacy
BaseBoard Manufacturer ASUSTeK Computer INC.
BaseBoard Model Not Available
BaseBoard Name Base Board
Platform Role Desktop
Secure Boot State Unsupported
PCR7 Configuration Binding Not Possible
Windows Directory C:\WINDOWS
System Directory C:\WINDOWS\system32
Boot Device \Device\HarddiskVolume3
Locale United Kingdom
Hardware Abstraction Layer Version = "10.0.10240.16392"
User Name Study-7\Richard
Time Zone GMT Standard Time
Installed Physical Memory (RAM) 4.00 GB
Total Physical Memory 4.00 GB
Available Physical Memory 1.03 GB
Total Virtual Memory 8.00 GB
Available Virtual Memory 4.47 GB
Page File Space 4.00 GB
Page File C:\pagefile.sys
Hyper-V - VM Monitor Mode Extensions Yes
Hyper-V - Second Level Address Translation Extensions Yes
Hyper-V - Virtualization Enabled in Firmware No
Hyper-V - Data Execution Protection Yes

Slow PC