Dark Lord of Tech :
What Antivirus are you currently running sometimes this is a false positive?
I'm using Avast (and have also run Malwarebytes).
I was using Audacity sound editing software yesterday and installed a plugin (from a website I was unsure about) to enable it to work with MP3 files, then within an hour or so my computer (laptop with Windows 10) started some strange behaviours...
I noticed that my computer was running a little slower and that a window would pop up and disappear very quickly (like a black MS-DOS script/command window). I noticed that the window would appear after I selected and connected to my Wi-Fi network ('Wi-Fi/Internet Access' icon/menu in the bottom right of the Windows Taskbar). Eventually, my anti-virus software (Avast) picked up on something and moved the file (setup.exe) into the 'Virus Chest' where it was quarantined, and then I selected the option to delete the file.
After that, I uninstalled Audacity and the plugin (plus three 'Microsoft Visual C++ Redistributable' installations that came along with the plugin - I noticed that when one of them was uninstalling it was displaying Russian language for the standard uninstallation wording).
Now, having deleted the setup.exe file and the above, the pop-up window/script is no longer appearing and the system appears to be running as normal.
However, my concern is that perhaps something (a virus) is still running in the background and could be causing problems. I'm concerned that the file/virus could possibly infect my personal files (documents, photos etc) and be using my Wi-Fi to access my system.
What would you recommend as options for me? I'd like to make sure 100% that the virus is completely gone from my system.
Details from Avast were:
Threat name: IDP.Alexa.51
Infected file: setup.exe
Original location: C

users/[user]/AppData/Local/Temp/{A903590C-FA7E-4E70-B6F4-E853D8C82EBB}
When I went to that location now there is a file called '_ISMSIDEL' (file type 'configuration settings').
Thanks for all your help, much appreciated!