Downloading issues

I'm having problems downloading anything. When I download something, whether I'm in Firefox or IE, the file downloads normally until it is complete. In IE the download window immediately disappears, and in Firefox the download "cannot be found". The file pretty much just completely disappears when it is finished downloading. I've searched for the files I download and found nothing. I've tried downloading to different locations also to no avail. Please help.

Search Network and Internet for similar issues.

This is the only other thread I can find like my problem.
http://www.vistax64.com/vista-general/6555-downloaded-files-disappear-actually-never-appear.html
One of the suggestions on there was to turn UAC off. I've had UAC off for quite a while now, so that can't be it.

Does the directory you are download to exist? Take ownership of that directory.

Yes.. I've tried desktop, documents, downloads, and many other places.

It's fixed now. I restored to about 5 days ago. I just have no idea why it started that all of a sudden.