The file fstopw.sys, known as F-StopW, belongs to software F-Prot Antivirus for Windows from Frisk Software. F-Prot Antivirus is an antivirus program that builds on the product's history of reliability, ease of use, and speed, which provides the user with a powerful and affordable antivirus solution. It provides real-time protection, ActiveX protection, and an automatic update system. The antivirus protection employs advanced heuristic-based detection that defends the system against new and unknown threats, which is coupled with fully automated and streamlined virus signature file updates and software upgrades. It scans and disinfects all file types including those downloaded by Web browsers and email applications, and infected or suspicious files are automatically backed up into a safe quarantine area before they are disinfected or deleted. Other features include email protection against threats from incoming and outgoing email attachments, and protection against malicious ActiveX code downloads.

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

A process usually a part of an installed application such as F-Prot An tivirus, 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 fstopw.sys. 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 fstopw.sys, belongs to, in this case F-Prot An tivirus