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Guys, help me understand what's causing the lag. There are no viruses, the hard drives are more than half full, I don't download anything unnecessary, I don't visit suspicious websites, the computer is 2-3 years old, all drivers are up to date, the video card is a GTX 650 Ti, 8 GB of RAM, a Core i5 with 4 cores. At one point, it showed 100% RAM usage, then it went back to normal, but the lag didn't stop.
I didn't even try to launch a campaign.