VAC was unable to verify the game session

[KillahInstinct]

Początkowo opublikowane przez "Better off Bob":

Hello everyone,

VAC was unable to verify the game session

Several people are reporting this on the forum and discussion should probably be consolidated.

Feel free to post about this problem here. Other threads on the topic may be locked and redirected here.

A few threads currently exist on this topic with a constructive conversation going, so those can probably still run.

Cheers.

[bluefacebleedem]

Guys I found solutions

1-Please Remove Iobit,ccleaner
****2-If you use Eset Smart Security Take GAME MODE
3-Restart PC
4-Play CSGO
5-Change Password

[ุ]

ITS FIXED

[himood habibi]

Same problem here for whole day

[★ Danceman ★]

Did you try running Steam as a Administrator?

[d1m0NESY]

I tried for 4 hours everything that everyone write and nothing have worked for me.
I think its Valve problem like before at 3July please Valve fix the problem.
Thank you

[gfkhgbmsetykt35536]

Help VAC was unable to verify your game session

[gfkhgbmsetykt35536]

Help VAC was unable to verify your game session

[★ Danceman ★]

Ccleaner is known to have problems with the VAC Scanner. Deinstall it. Deinstall any app you don't need. What antivirus are you using? Could be interfaring

[Robert De Niro]

I found the easy solution for me, after trying the VAC error fix post, is to log out of steam and re-log in (changing user, not exiting Steam). Hope this helps :D

[laph]

Problem still persist I tried everything posted here, whats next??

[cLeAnEr]

Początkowo opublikowane przez SrLe:

how can i fix the problem ?

Ich habe alles gemaht aber es geht nicht... :(

guys do 1 thing.. goto steam settings then downloads. clear game cached files.. it worked for me... i hope it work for u as well

[★ Danceman ★]

Could be the Firewall. Check if it's open for Steam and csgo. I've written a batch code, that may help. Or just try to disable the firewall and see if it works

@ECHO [Working...]-------------------------------------------------------------------
ECHO Firewall...
netsh advfirewall firewall add rule name="Steam" dir=in action=allow enable=yes protocol=udp program="%systemdrive%\Program Files (x86)\Steam\Steam.exe"
netsh advfirewall firewall add rule name="Steam" dir=in action=allow enable=yes protocol=tcp program="%systemdrive%\Program Files (x86)\Steam\Steam.exe"

netsh advfirewall firewall add rule name="Steam Web Helper" dir=in action=allow enable=yes protocol=tcp program="%systemdrive%\Program Files (x86)\Steam\bin\cef\cef.win7\steamwebhelper.exe"
netsh advfirewall firewall add rule name="Steam Web Helper" dir=in action=allow enable=yes protocol=udp program="%systemdrive%\Program Files (x86)\Steam\bin\cef\cef.win7\steamwebhelper.exe"

netsh advfirewall firewall add rule name="Steam Web Helper" dir=in action=allow enable=yes protocol=tcp program="%systemdrive%\Program Files (x86)\Steam\bin\steamwebhelper.exe"
netsh advfirewall firewall add rule name="Steam Web Helper" dir=in action=allow enable=yes protocol=udp program="%systemdrive%\Program Files (x86)\Steam\bin\steamwebhelper.exe"

netsh advfirewall firewall add rule name="Counter-Strike Global Offensive" dir=in action=allow enable=yes protocol=tcp program="%systemdrive%\Program Files (x86)\Steam\steamapps\common\Counter-Strike Global Offensive\csgo.exe"
netsh advfirewall firewall add rule name="Counter-Strike Global Offensive" dir=in action=allow enable=yes protocol=udp program="%systemdrive%\Program Files (x86)\Steam\steamapps\common\Counter-Strike Global Offensive\csgo.exe"
@ECHO -------------------------------------------------------------------------------
echo.

[★ Danceman ★]

There is this app that does many of the things above
https://www.reddit.com/r/GlobalOffensive/comments/3970xp/another_vac_authentication_error_solution/

[d1m0NESY]

I deinstall CCleaner after that i deinstal everyother program that may have problem with VAC scanner nothing new.I use Avira antivirus.I go into windows firewall i delete everything for steam and cs go and nothing changed.

[★ Danceman ★]

Any ways I use Avast which has a game mode by the way.