问题：
"Your system is out of date, you are missing important Windows updates!"
"Warning: your system hasn't been patched against critical Windows security vulnerabilities."
解决办法：
If you have the first error, this is because you are using an old version of Windows 7, that does not support SHA2 code signing, which is now required by a Microsoft policy for new drivers signing certificates. There is no way around that, you will have to make sure your OS has the last security updates.
To fix both of these errors, make sure you apply the latest security updates from Windows update. If you are unable to use Windows update, you can get them from Microsoft website:
Windows 7 SP1 and Windows Server 2008 R2 SP1 update history
Windows 8.1 and Windows Server 2012 R2 update history
Windows 10 update history
We are aware that some people using cracked versions of Windows are unable to apply any updates because their OS has been modified. There is nothing we can do about that, you will need to reinstall a version of Windows where updates are working properly.
这个意思就是说，如果出现上面的问题，就是你的系统太老了。需要更新。

问题：
FPS drops/stutter when using the mouse and/or keyboard
解决办法：
This is likely caused by a file being blocked by the AC that is constantly trying to reload into the game, and thus cause stuttering. Your debug.log file in %appdata%/FACEIT/FACEIT Client will give you information about which file has been blocked. Read below about how to deal with blocked files.
This could also be caused by having -high in your Steam game launch options. It is not recommended to use this launch option, as it can mess up with the Windows process scheduler and cause some mouse lag issues for some people.
这个是说，如果你使用键盘鼠标的时候，FPS 断断续续，或者下降的厉害。跳FPS。
解决办法：
这可能是因为AC阻止文件不断尝试重新加载到游戏中，从而导致跳FPS。你可以查看％appdata％/ FACEIT / FACEIT Client中的debug.log文件将为您提供有关哪个文件被阻止的信息。请阅读以下有关如何处理被阻止文件的信息。
这也可能是因为您的Steam游戏启动选项中有“-high”。建议不要使用此启动选项，因为它可能会破坏Windows进程调度程序并导致某些人出现鼠标延迟问题。

AutoHotkey is forbidden, please close it and restart FACEIT AC
If you are running AutoHotkey, simply close it. Otherwise, it means that you have a program running that was compiled by AutoHotkey. The following apps are known to cause this error:
Vibrancer
SBZ Switcher
TrayMenu.exe
menu.exe
这个是说，一个软件，要先关闭才行。可能是什么热键程序吧。

Wrong GPU used on dual GPU laptops, resulting in low FPS
The game might start on the wrong GPU in some cases, when using the AC. You might need to force the usage of the Nvidia/AMD GPU instead of the Intel one on the FACEIT AC (faceitclient.exe) and/or the game, to make sure the game starts on the right one. You can do this through the Nvidia/AMD control panel.
这个是说，某些双显卡的笔记本电脑，如果使用了AC的话，可能会导致游戏使用INTEL集成显卡。
需要手动设置一下，强制使用独立显卡运行游戏才行。

You need to disable Hyper-V to launch FACEIT AC
Open an administrator command prompt and type the following:
bcdedit /set hypervisorlaunchtype off
Restart your computer and the AC should then work properly.
这个是说必须要禁用Hyper-V才能启动FACEIT AC
打开管理员命令提示符并键入以下内容：
bcdedit / set hypervisorlaunchtype off
重新启动计算机，AC应该正常工作。
也就是说，不能启动WINDOWS 自带的虚机功能来用AC反作弊器。
要不然嘿嘿。。。。

You need to enable the NX/Execute Disable bit in your computer BIOS
Restart your computer, press F2 or DEL to enter the BIOS Setup menu, find the option called "NX Bit", "Execute Disable bit" or "XD bit" and turn it back on.

"Blocked file <xxxxxxx>"
The AC protects the game and block some files that are seen as suspicious when they try to get loaded into the game. If the game is working properly, then you can simply ignore this message.
If this is preventing you from launching the game, some of your Windows files or video driver files might be modified and/or corrupted. Please try the following solutions:
Do a system scan with Malwarebytes Anti-Malware to find any malware that might have modified critical windows files
Your system's root certificate might be broken/outdated, try to update them with this Windows update page: Support for urgent Trusted Root updates for Windows Root Certificate Program in Windows
Check for corrupted Windows files with the System File Checker
Search on Google the blocked file name, that will probably tell you from which program it comes from. If the file is related to your video/network/audio drivers, simply updating them to the latest version should resolve the issue.
AC保护游戏并阻止一些在尝试加载到游戏中时被视为可疑的文件。如果游戏运行正常，那么您可以简单地忽略此消息。
简单的就是说，如果你运行游戏之后，提示：Blocked file XXXXXXXXXX这一段话。
那就是因为有东西正在不断的尝试加载到CSGO游戏中。而AC正在阻止他们。
如果你运行正常的话。那么就请忽视。
如果游戏不能正常运行的话，你就要好好检查一下了是什么问题了。
使用Malwarebytes Anti-Malware进行系统扫描，以查找可能已修改关键Windows文件的任何恶意软件
系统的根证书可能已损坏/过时，请尝试使用此Windows更新页面更新它们：支持Windows中Windows根证书程序的紧急受信任根更新
使用系统文件检查器检查损坏的Windows文件
在Google上搜索被阻止的文件名，这可能会告诉您它来自哪个程序。如果该文件与您的视频/网络/音频驱动程序相关，只需将其更新为最新版本即可解决此问题。
很多老哥，可能都会碰到这个问题。
Blocked file C:/Windows/SysWOW64/uxtheme.dll blocked aс:\windows\SysWOW64\gdiplus.dll

"Error verifying digital signature. Make sure your system's root certificates are up to date."
You have this error because your system root certificates are broken/outdated. You can update your root certificates by downloading the correct Windows update on this page: Support for urgent Trusted Root updates for Windows Root Certificate Program in Windows
“验证数字签名时出错。请确保您的系统的根证书是最新的。”
您有此错误，因为您的系统根证书已损坏/过期。您可以通过在此页面上下载正确的Windows更新来更新根证书：支持Windows中Windows根证书程序的紧急受信任根更新
根证书出错。更新一下就好。

"Failed to check for updates"
If you have a strict firewall then please ensure that the port 6789 is set open for TCP. We also recommend making sure that if you have an anti virus you ensure the client is given an exception in order to allow it to function properly on your system.
“无法检查更新”
如果您有严格的防火墙，请确保端口6789已设置为TCP打开。我们还建议您确保如果您有防病毒，请确保为客户端提供异常，以使其在您的系统上正常运行。

The client crashes a few seconds after starting, or the client does not start
Open an administrator command prompt and type:
Click Start, click All Programs, and then click Accessories.
Right-click Command prompt, and then click Run as administrator.
If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
Then type bcdedit /debug off and press enter
This should allow the client to start without crashing.
如果你启动游戏后，几秒钟客户端自己关闭 崩溃 或者消失
单击开始，单击所有程序，然后单击附件。
或者打开管理员：命令提示符
用鼠标右键单击命令提示符，然后单击以管理员身份运行。
如果出现“用户帐户控制”对话框，请确认其显示的操作是您所需的操作，然后单击“继续”。
然后键入bcdedit / debug off并按Enter键
这应该允许客户端启动而不会崩溃。

下面说一点别的方面的问题。
关于更改名字。
FACEIT 更改名字是要花1000F点的。
这个大家要注意呢。。。。。
不过每邀请一个朋友。并且他们成功注册并绑定了游戏的话，你就可以赚取100F点。

如果你跟你朋友的连坐，或者在一个网吧里，那么想加入同一个服务器，需要修改一下网络端口才行。
办法也非常简单。

进入您的Steam库并右键单击CS：GO / Dota2向下滚动到属性。

在启动选项窗口中选择“设置启动选项...”，写入“+ clientport 2700X”X = 6/7/8/9（默认值= 27005）
修改不同的 序号ID即可。