major download problems with firefox

I am having major problems downloading anything in firefox, images, updates, any kind of download fails.

I am having no problems with the other browser I use ... chrome

This is the pop up I get when downloading

One strange thing that is occuring is that I cannot change the default download folder in firefox. I created a new folder called downloads_2, go into firefox settings browse to that folder and select it, but firefox wont change to the new folder I selected. Its odd, because no where is there a setting that says apply.



Here is other things I have tried so far....
-close firewall and virus protection
-disable all add ons and extensions
-cleared download history
-did a complete uninstall of firefox and then reinstalled.

Any help would be appreciated, I've always prefered firefox, but this makes it unusable to me

That partial download file DOES NOT belong to FF.

Suggest you go
C: Program files And
C: Program files (X86)
and delete all folders for FF.
clear all your temp files using TFC.
Run virus/malware scans
REBOOT

Then download FF via Chrome.

Roy

I did not say it was an FF file but merely a partial file of something.
Also seems your advice was same as mine - almost.
Running malware scans should be almost redundant these days. (but you never know)

@baddog.... I uninstalled firefox using windows add/remove programs. Should I have tried to do it within Firefox?

Regarding the alert pop up I posted, that was a screen capture after trying to download a file. Based on whatever file I try to download I get a similar error message except the file name changes based on the file name I was trying to download.

Could you elaborate on where I should look for all those steps you noted while in safe mode..should I be exploring in programs section?

@torchwood ..... what does TFC stand for?

Just to address program removal, the Windows 7 Uninstall Programs just does not do as good a job
as, say, IOBit Uninstaller or other more advanced Uninstallers for they find and delete more remnants
of the program as in the registry and elsewhere. One shouldn't be in any program that is to be deleted.
That said, now that you can't reinstall FF you can't uninstall what isn't installed. But you can do the
manual things mentioned to try and get rid of all remnants that may be bogging you down and
eventually install FF again.
Sorry to sound like a broken record but do you have full disk backups or system images from when it
was working right? If yes, recover. If not, have some next time.
Good luck.