Steam overlay doesn't work!

[adu.12]

Starting validation of Alliance of Valiant Arms
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Characters\Ava_CH_instanceMat.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Characters\AVA_EU_Helmet_CS.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Characters\avaCharCommon.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Characters\avaCharCommon_01.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Effects\avaDecal.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Maps\Progress\avaEntry.his
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Maps\Progress\SW-Pyramid.his
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Maps\Progress\SW-ShowDown.his
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Maps\Progress\SW-StormBlitz.his
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Maps\Progress\SW-Township.his
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\UI\USA\IconFonts.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W079.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W080.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W091.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W098.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W100.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W102.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W110.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W111.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W112.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W113.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W118.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W121.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W123.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W124.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W127.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W133.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W134.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W135.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\W_UAV.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\Wp_Heavy_RPG7.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\Wp_M67.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\Wp_Pis_Beretta92Fs.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\WP_Pis_Socom.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\Wp_Rif_AK47.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\Wp_Rif_M16A2.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\Wp_Rif_M4.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\Wp_Scope.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\Wp_Silencer.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\Wp_Sn_L96A1.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\Wp_sn_TPG1.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\Weapons\WP_sn_vss.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\GameLocalSC-PC-D3D-SM2.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\GameLocalSC-PC-D3D-SM2P.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\GameLocalSC-PC-D3D.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\gamerefsc-PC-D3D-SM2.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\gamerefsc-PC-D3D-SM2P.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Content\gamerefsc-PC-D3D.upk
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Web\Notice\a_01.png
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Web\Notice\b_01.png
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Web\Notice\c_01.png
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Web\Notice\e_01.png
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Web\Notice\new_item.ini
Validation failure: d:\jeux\steam\steamapps\common\ava\avaGame\Web\Notice\notice.ini
Validation failure: d:\jeux\steam\steamapps\common\ava\PurpleRpcUsa_r.dll
Validation complete: 691 Total Files, 55 Failed Validation

Starting validation of Alliance of Valiant Arms
Validation complete: 666 Total Files, 0 Failed Validation

how to fix it?

[Kirigaya Kazuto]

:/
Sorry bud, but some of your files are corrupted.
You may have to re-install it

[Terell.]

When your on the reactor select AVA then click repair.

[Kirigaya Kazuto]

When your on the reactor select AVA then click repair.

AFFFF
STFU with that reply, that shit doesn't work.

[Terell.]

Calm down just trying to help the fellow. I tell him to click the repair button because it will recover all his missing/corrupt files. Always fixes my errors.

[adu.12]

Calm down just trying to help the fellow. I tell him to click the repair button because it will recover all his missing/corrupt files. Always fixes my errors.

where is repair button?