As for drive C and D. If to format is it better to do it on both or just the C?

Thanks!

This post has been edited by Christopher7: Aug 9 2018, 11:48 PM

That's why you need to recognize what is the legal and normal processes running in Task Manager. Anything strange, you can google it to check owner.

The problem with virus when in C: or where OS is running. Usually nothing in D:, which is normally to store data, is running. Only running applications call the data. So, virus in D; will not be activated.

I would just format C:. Install anti-virus first and scan D:. After everything okay, install all required software.

Because many of my application now messed up in both C and D
Sometime when install forget to change the path to D then now I feel like transfer all my thing to External HDD and make it brand new

i
May I know what is the legal and normal processed u mean?
Been using mac for 7 years now only switch back to Window

When you press Ctrl+Alt+Del you can select Task Manager. There you can see under processes what exe is running. If yours is still fresh install will all necessary application, you can observe what is running there. If in future you suspected some virus, you can see there and see if there is any exe that is not familiar to you. Then you can confirm what the file is by Googling.

Some people with limited space on C: can also install application on D: This way you need to format both, No choice but to back-up your important data. My friend when done all the necessary installation, create an image of the HDD. That way in case he need to reformat the whole thing, he can just reinstall the image. Must faster this way and everything back to familiar setting. HDD is not expensive nowdays

My 2 cents from my PC experience on the slow down (this is assuming you have enough RAM and hdisk to start with).

AA
Use only 1 anti virus software. If 2 or more, they may be "fighting" each other and thus slows down the computer.

BB
Cannot remember exactly how this was done now. But basically it is to disable all non MS services/programs, then startup. Enable those which you really need.

CC
Try Ghostbuster to clean up the drivers. Too many driver duplicates will slow down the computer when it tries to get the driver.

Best to do your restore point before you do the above. Just in case, you can go back.

Good luck!