What is VAC?
VAC is the abbreviation of Valve Anti-check technology, which is a system to automatically detect cheating programs installed on users' computers. If a computer connected to a VAC-protected server has a detectable cheating program installed, the VAC system will prohibit the user from playing the game on all VAC-protected servers in the future.
VAC system can effectively detect cheating programs through their signatures. Any third party's changes to the game that make players gain unfair benefits, including any changes to the game's core execution files and dynamic link libraries, are classified as cheating or hijacking, and will trigger a VAC ban.
Why can't some players play other VAC games after CSGO is banned by VAC? Maybe it was misled by other games. In V's own games, some games will affect other games after being banned by VAC. Refer to the contents of Steam customer service center:
Cheating in any of the following source games or source modules will cause all games in the list to be banned by VAC:
Counter-terrorism elite: origin
Half-life 2: Death Race.
Victory Day: Source
Team fortress 2
Similarly, cheating in any of the following Jinyuan games or modules will cause all the games in the list to be banned by VAC:
Counter-Strike
Zero action
ricochet
Victory day
Legion fortress classic edition
Half-life: Death Race
Death contest classic edition
It can be seen that the above list does not include CSGO. Although both CSGO and Counter-Terrorism Elite: Origin (CSS) use the source engine, CSGO uses the latest version of the source engine which is different from CSS.
Therefore, if the CSGO game in the Steam account is blocked by VAC, you can still continue to play other games. Of course, this website is just a popular science. I hope players can maintain a level playing field.