CS2 slows down pc and having huge lags and fps drops

Hi. I also had this problem once, not specifically with CS2, but mine was also very bad, so I have some tips that MIGHT help you:1. Check your PC for viruses (yes, even if you are sure that there are no viruses, believe me, there MIGHT be).- Some viruses disguise themselves as system files, programs, applications, etc.2. Update your drivers to the latest version (yes, this is ALSO VERY IMPORTANT).- This is a bit more complicated, even if you already have the latest drivers, it still doesn't guarantee you normal operation, because even the newest ones can crash.3. Check your internet connection, it can cause huge lags, as you said.4. Check the internal condition of your PC (I mean the condition of the components, maybe it's time to update the thermal paste or something)5. REMEMBER, the game (official, without viruses, from the store) CANNOT INFLUENCE the performance of the PC, and even more so load it so much that even after launching it begins to “stall”.6.  You may have forgotten about Windows Update (yes, this bastard is also very capable of “loading” the PC).7. When your fps feels bad (drops), look in the “console” (`) ) for errors, because they may be the cause of your problem.8. VERY IMPORTANT:  Try logging into the system through “safe mode” and see which process in the manager is loading your system.Even if that doesn't help, at least you'll have the basic knowledge.

Sorry for the unreadable text, BO3 doesn't allow you to edit it to make it readable. But I think that's the least of your problems right now.

If you try it, let me know and I'll be happy to help.

I just noticed that you mentioned that you have already rebooted the system, so the problem is most likely not viruses or corrupted system files, because after reinstalling they are RESTORED.So, the problem may now be of a hardware nature, that is: Incorrectly configured programs, breakdown of devices such as: video card, processor, RAM, hard disk, ssd, power supply, wires connecting all these components, motherboard (although if it breaks, the PC will not work at all)