Dear Lord...
I'm surprised Photoshop is working at all, especially if you are running the latest version of PS CC. Yeah, that Video Card doesn't have enough horsepower for Photoshop in 2025. Your lagging will just get worse as time goes on. Here is a list of recommended Video Cards for Photoshop. I recommend one with a score of 10,000 or better in 2025. The closest to your Video Card is a GeForce GTX 1060 with 5GB of Video Memory and that has a score of 4189.
Before you head down this Rabbit Hole, it really sounds like you upgraded to Windows 11 on a 4 year old computer, and the components inside, while good 4 years ago, doesn't hold up to what Photoshop is now. This is why I recommend such expensive things and jump up-and-down about Video Cards. Adobe keeps upgrading Photoshop, it seems 2-3 times per year these days, and unless you have BEEFY Hardware, you can't blindly upgrade thinking things will work.
I know folks like to purchase things they can afford, but what they really need to do is purchase things they NEED, and plan for the computer 4 years from now. Otherwise, you are buying a new computer every 36-48 months to keep up with software. Gone are the days of running Photoshop CS6 for 12 years.
Feel free to purchase the WebRoot if you'd like. Personally, I wouldn't...but it's not my money. I would, however...start saving up for a new computer.
Why a new computer?
Because Video Cards these days are like "Computers within Computers." They are HUGE and a new NVIDIA RTX 4070 or 4080 (Hell, even one like a 3070 or 3080) won't physically fit inside your computer. Plus, you have to upgrade the Power Supply, and then your Motherboard probably won't have the type of slot you need to support it, then you have to buy a new Motherboard, RAM that will work and then a CPU Chip. All for a friggin' Video Card.
It's just easier to purchase a new computer all at once. Cheaper too.
To show you what I mean about purchasing a Video Card off the shelf, here is a YouTube Sort Video of someone installing a NVIDIA 4080 in their computer. Now you know what I mean about "HUGE." Try fitting one of those damn things into your Dell. LOL!!