  We present exact solutions of four-dimensional Einstein's equations related
to Minkoswki vacuum constructed from Type IIB string theory with non-trivial
fluxes. Following recent works, we study a non-trivial flux compactification on
a fibered product by a four-dimensional torus and a two-dimensional sphere
punctured by 5- and 7-branes. By considering only 3-form fluxes and the
dilaton, as functions on the internal sphere coordinates, we show that these
solutions correspond to a family of supersymmetric solutions constructed by the
use of G-theory. Meromorphicity on functions constructed in terms of fluxes and
warping factors guarantees that flux and 5-brane contributions to the scalar
curvature vanish while fulfilling stringent constraints as tadpole cancellation
and Bianchi identities. Different Einstein's solutions are shown to be related
by U-dualities. We present three supersymmetric non-trivial Minkowski vacuum
solutions and compute the corresponding soft terms. We also construct a
non-supersymmetric solution and study its stability.
