The account cheated or some sort of sharing has occurred. (account, library or phone number)

VAC bans are permanent.

引用自 dimitriu.davidd：

WhY

Hello,

VAC bans are given solely due to cheating. There is no other reason for a VAC ban to be issued.

I wish you the best VAC ban experience for the years to follow, and may your journey be filled with fair play and integrity.

VAC live should be fixed, we want a game without cheats

I can't imagine buying an account without either first checking if it's banned, or checking if the ban can be removed or not before buying it. I imagine I'd feel quite stupid if I did so.

引用自 dimitriu.davidd：

WhY

Because you bought an account with a six year old (hidden) vac ban.

引用自 dimitriu.davidd：

Vac
WhY

we can ask you, Why buy a steam account? when steam accounts are free to make.

But to answer you, vacbans are for cheating and your 2241 day old vacban is permanent. so go to your profile and click on the info button next to your vacban