Many users state that their anti-malware tools flag the cs1sa1f.dll file as a malicious program related to variants and components of the Trojan.Win32.Agent.ati application, which is a family of Trojans and worms known to infect unprotected Windows-based computers with outdated OS security certificates and an unsecured Windows System Registry. Other user groups reported that their system security programs classify the cs1sa1f.dll file as a malware item associated with variants of the PWS-Zhengtu application, which is a family of Trojans known to be embedded with spyware functionalities. Both user groups claim that the cs1sa1f.dll malware is capable of exploiting unencrypted TCP/IP network ports of the unprotected Windows-based computer, especially systems with outdated or missing OS security certificates and an unsecured Windows System Registry, in order for the cs1sa1f.dll malware and its executable component processes to use these exploited system vulnerabilities to download more malicious applications unto the infected computer from remote servers that are managed by the authors of the cs1sa1f.dll malware. Some users state that the cs1sa1f.dll malware uses these exploited TCP/IP network ports to transmit stolen data to these remote servers, in which these stolen data is said to include secretly gathered private user details like passwords, account credentials and Internet surfing information from the infected system and its installed Web browsers.

Most non-system processes that are running can be stopped because they are not involved in running your operating system. cs1sa1f.dll. is used by Trojan.Win32.Agent.ati and PWS-Zhengtu Trojan, If you shut down cs1sa1f.dll, it will likely start again at a later time either after you restart your computer or after an application start. To stop cs1sa1f.dll, permanently you need to uninstall the application that runs this process which in this case is Trojan.Win32.Agent.ati and PWS-Zhengtu Trojan, from your system.

After uninstalling applications it is a good idea to scan you Windows registry for any left over traces of applications. Registry Reviver by ReviverSoft is a great tool for doing this.

The ReviverSoft experts have not yet reviewed cs1sa1f.dll

A process usually a part of an installed application such as Trojan.Win32.Agent.ati and PWS-Zhengtu Trojan, or your operating system that is responsible for running in functions of that application. Some application require that they have processes running all the time so they can do things such as check for updates or notify you when you get an instant message. Some poorly written applications have many processes that run that may not be required and take up valuable processing power within your computer.

We have not received any complaint about this process having higher than normal impact on PC performance. If you have had bad experiences with it please let us know in a comment below and we will investigate it further.

The first thing you should do if cs1sa1f.dll. is causing errors on your computer is to run a Windows registry scan with Registry Reviver If you are still seeing errors after this you should uninstall the program that cs1sa1f.dll, belongs to, in this case Trojan.Win32.Agent.ati and PWS-Zhengtu Trojan