a problem while using windows defender

[cy.]

Hello all

so... i've installed win defender in place of MS antispyware

just when i thought MS has done an excellent job, I found myself not being able to download anything from the internet.

IE tries to download a file and the moment it finishes downloading, the file gets vanished.

I wasn't downloading anything weird. i was trying to download a pdf file.

i've tried to download something else, same thing happened.

has anyone experienced the same problem?