Resources? Must be me.

Where do I start? Sorry if this is posted in the wrong section.
My system specs are:
Operating System
Windows 10 Pro 64-bit
CPU
Intel Core 2 Quad Q9550 @ 2.83GHz 47 °C
Yorkfield 45nm Technology
RAM
8.00GB Dual-Channel DDR2 @ 399MHz (5-5-5-18)
Motherboard
Gigabyte Technology Co. Ltd. EP45-UD3R (Socket 775) 38 °C
Graphics
S20B300 (1600x900@60Hz)
1024MB NVIDIA GeForce 210 (Gigabyte) 47 °C
Storage
298GB Western Digital WDC WD3200AAKS-00L9A0 ATA Device (SATA) 29 °C
931GB Western Digital WDC WD1001FALS-00E8B0 ATA Device (SATA) 34 °C
931GB Seagate ST1000DM003-1CH162 ATA Device (SATA) 27 °C
Optical Drives
HL-DT-ST DVDRAM GH20NS10 ATA Device
Audio
Realtek High Definition Audio
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I am not to computer savey but I do know when editing my youtube videos I could select some type of exelleration before.
Now this is ngreyed out and not available?
My guess is maybe to many resources are taken?

How can I safely disable resources? Each time I select one it will say that " If you end this process it may result in unstable system or program crash."
Is there a software that can automatically disable the safe once?

It looks like the highest resources ae Anti Virus, IOBit Malware and Advanced System Care.
The Hard drive constantly jumps from 30 to 100%

When I render video it always stops at about 60%
Will it render faster by having the files on a external drive?

I just dont know how to fix this and would like some safe suggestions for dummies.
Thanks