Computer Is Slow and lagging too much .

[niks3]

Computer Is Slow and lagging too much in each operation. Even three crome windows not running smoothly.Everywhere it is lagging too much even after it has 8gb Ram, i7 processor.

[WAWood]

@niks3 

I see you're running Widows 10 ...

With a Win10 PC, you're going to experience a variety of problems not typical of the older PCs.

First is sluggishness. You may experience a very slow PC at times because Windows Update (WU) is hogging your PC, searching for, downloading, and installing updates -- to bring your PC up to the most current version of Windows. This can also contribute significantly to high processor temperatures, as it is being heavily used.

Second is fan noise. That's directly related to fan speed, which is the result of processor heat, and WU is known to drive up the processor load -- sometimes to 100%. That can cause the fan to run loud and continuous for some time.

Third is disk usage. WU can easily force the disk usage to 100% and and keep it pinned there for some time. That's because it wrote WU files to the drive, then it turned around and read them, then it overwrote existing Windows System files. All of that takes a lot of disk usage to complete.

These processes are compounded by Win10 because new Win 10 patches coming out nearly every Tuesday. Since you can't stop Updates like you did with Win7, this means you're going to get updates, regardless of what you do.

To find out what version and build of Win10 your PC is running, do the following:
1) enter "cmd" (without the quotes) into the search area and select the Command Prompt option
2) enter "winver" into the command window (again, without the quotes)
3) the most current Win10 version (as of 4/2/19) is v1809 Build 17763.503.

If yours is older than that, most likely WU is hogging your PC trying to update it.

Some folks have been told that resetting your PC will fix this. but, if you reset your PC, you only make matters WORSE! Why? Because you will reset Win10 back to the original version that came preloaded on the PC and that will restart Windows Update all over again.

To disable WU temporarily, do the following:
1) Enter "services" in the search area (again, without the quotes)
2) When the window opens, scroll down until you see Windows Update
3) If it say Running under status, that indicates that WU is running
4) To change that, double-click on that task, select Stop under the Service status, and then Apply
5) That should stop WU -- and you should see an immediate improvement in performance.

If not, then WU is not the problem.

WU will restart itself automatically later on, so you basically have no choice than to bear with it until it finishes.

[jbergene]

if these are your specs:

• 2.7GHz Intel Core i7-7500U 7th Gen processor
• 8GB DDR4 RAM
• 1TB 5400rpm Serial ATA hard drive
• 15.6-inch screen, Nvidia GeForce 940MX 4GB Graphics
• Windows 10 Home operating system

The only thing I can see that cause troubles for you is the HDD. 

This PC should have no problem whatsoever to run windows 10 and apps like chrome with many tabs open at the same time. 

Right click on the task bar and open task manager. See if there are any apps that use either a lot of CPU or a lot of RAM. 

Find out what it is, and maybe you can close it.

If its a windows update, or a program related to windows update or security, you just have to let it run its things.