You do have a "multitasking" CPU. I'm not sure what you mean. Multitasking is built into the OS.. I would be surprised if you could do a CPU upgrade that would help much. Even if you could, there are design limitations, mostly related to cooling and power, that would need to be considered. Assuming your processor is socketed, do some research starting here: https://ark.intel.com/content/www/us/en/ark/search/featurefilter.html?productType=873
If you are still running a HDD instead of an SSD, I would start there.
You do have a "multitasking" CPU. I'm not sure what you mean. Multitasking is built into the OS.. I would be surprised if you could do a CPU upgrade that would help much. Even if you could, there are design limitations, mostly related to cooling and power, that would need to be considered. Assuming your processor is socketed, do some research starting here: https://ark.intel.com/content/www/us/en/ark/search/featurefilter.html?productType=873
If you are still running a HDD instead of an SSD, I would start there.