For more information, follow this guide:
https://www.techy.how/tutorials/csgo-fix-vac-error

A short tutorial on how to fix the “VAC was unable to verify your game session” error for CSGO.

Error Reads:
Matchmaking Failed
VAC was unable to verify your game session.

Timestamps:
0:00 – Introduction
0:16 – Verify Integrity of Game Files
0:38 – Clear Steam Downloads Cache
0:58 – Exit Steam
1:04 – End Steam from Running in Task Manager
1:09 – Re-Launch Steam as Admin
1:16 – Reliable Network Connection
1:20 – Reinstall Steam as a Last Resort

Leave a comment if you have any questions.

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