close your wallet, right click on the wallet icon, create shortcut
then right click on the shortcut you just made and go to properties
in the properties section, in the "Target" box, go to the end of the string (outsided of the parenthesis if there are any) and add this:
-rescan
click on apply, and then okay
then open your wallet with the shortcut
you only have to do this once

This will take a bit of time since the chain is pretty big, but at the end your wallet should have all your transactions and missing funds show up.