Sorry for my reply. I am only an F-Secure user (their home solutions).
This is a Potential Unwanted Application detection for Ask Toolbar installer (or its modified build).
Sounds that your state (maybe) is about static cached downloaded content (browsing/visited page or try to download Ask Toolbar).
Detected item (UpdateManager.exe) is under zipped container (archive AskToolbarInstaller-AVR-TG.7z). Since detection is only about packed item - F-Secure does not remove entire .7z-file.
Instead, possible to remove this (AskToolbarInstaller-AVR-TG.7z) manually.
For example, to locate C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5 and find this .7z-file -- rightclick and delete it (with further clean up for Recycle Bin).
In addition, possible to try and perform clean up for browser's cache (but it will affect some other points).
I am not sure that such situation is completely safe - but just because nothing else is detected - maybe manual removal for .7z-file is enough.
// by the way - if it is not possible to locate folder: possible to try clear cache/temp internet files of browser. Based on your browser in use - possible to perform it with different steps. In general, possible to try with any of installed browsers (system ones included). For Internet Explorer:
Good if you will back with feedback!
Thanks for your help. I'll try simply deleting the "Ask Toolbar Installer"file.
If it is impossible to do this (as example, folder is not accessible based on some reasons) - one another option is to try configure Scheduled scan.
Maybe Scheduled Scan will remove such item automatically. Just as check.
Otherwise - clean up for temporary internet files/cache is only solution (with less steps compared to another more tricky workarounds).