Community Feedback asked me to get in touch, as my Avast is picking up a Win32 Trojan on a file that doesnt exist on my computer. It was a Kiwi Toolbar that was uninstalled a long time ago.
What can I do about this, any help would be appreciated
So, what is the file name given that is not on your computer?
Sorry I should have called it a folder, and all i know is it is Kiwi Toolbar which my hubby installed ages ago and then uninstalled, for some reason it has started showing up when I run Avast, this started 2 days ago. Community Feedback had someone with a similar problem and they advise me to come here and ask
I certainly doubt avast! would detect a non-existing file 
I’d say the uninstaller simply didn’t remove (all) the files.
To know if a file is a false positive, please submit it to VirusTotal and let us know the result. VirusTotal has a file size limit of 10Mb. You can use VirScan also.
If it is indeed a false positive, send it in a password protected zip to virus@avast.com. Please, mention in the body of the message why you think it is a false positive and the password used. Thanks.
Maybe you need to disable Hide protected operating system files and enable View hidden files and folders to manage the file(s).
As a workaround, you can add these files to the Standard Shield provider (on-access scanning) exclusion list.
Left click the ‘a’ blue icon, click on the provider icon at left and then Customize. Go to Advanced tab and click on Add button…
You can use wildcards like * and ?. But be careful, you should ‘exclude’ that many files that let your system in danger.
Sorry the screenshot didnt go here it is again
It does not seem a false positive, but an adware… maybe I’m wrong.
The other files will be gone if you clean your restore points.