The msiexec.dll file has been reported by many users as a malicious program disguised as a legitimate Dynamic Link Library (DLL) module, and the same user reports claim that the msiexec.dll process is a variant of the Infostealer.Bzup application, which is a known spyware. Some users reported that the msiexec.dll process is also embedded with Trojan-like functionalities. The same users said the msiexec.dll process, upon its successful placement and activation in the Windows-based system, is capable of searching for system vulnerabilities, particularly unprotected TCP/IP network ports that it can exploit and use to initiate contact with remote servers that are operated and managed by the authors of the msiexec.dll spyware. According to the same users, the msiexec.dll then begins to upload private user data and Internet surfing information this malicious program has secretly collected from the infected system and its default Web browser to those predesignated Web servers, without user consent.

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

A process usually a part of an installed application such as Infostealer.Bzup Spyware, 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 msiexec.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 msiexec.dll, belongs to, in this case Infostealer.Bzup Spyware