Not long after MS released their DOS M$ began rolling and became so big (under bill's guidance),it became unstoppable.
I remember m$ buying all competitors and shelving them or absorbing them into what became eventually Win95.
As far as searching goes I doubt any competitor will be found to rival google.
From memory By about the time win95 was released, Europe became really pissed of at M$ monopolistic tactics. Similar thoughts were raised earlier in the 'states but m$ simply put in the hands of their lawyers (while the $ was rolling in) and was happy to eventually settle for a fine. (whatever the size) [it didnt matter because time had passed & m$ already had the market]
the rst is history.