[willy]

Been thru some of this myself Mike. You have water stacking up against the foundation, which builds hydrostatic pressure pushing down forcing the water to take the path of least resistance.
You could have a high water table where you are i don't know, you could have city water pipe or well pump pipe leaking, or it could just be poor drainage on your property putting to much water up against your foundation.
You can paint etc. seal the walls or whatever. if you do not fix the cause it will return.
Downspouts could be routed to a drain system and/or you could get a fellow with a small backhoe come in and install a french drain around the perimeter as long as you have a direction to channel water too.
If not you can dig a large pit filled with stone to drain to and aloow the water to build pressure there rather than against you house.