can't start without shdocvw.dll

I have a Dell and it only has one main drive volume.somehow file shdocvw.dll got deleted. now windows will start up but when I click my name to log on, a window pops up telling me "this application failed to start because shdocvw.dll was not found.reinstalling the application may fix this problem". my question is: when i go into safe mode command prompt can i open the recycle bin retrieve file and reinstall it? or is there another way.