Compaq CQ61 Windows 7 64bit touchpad dead

Hello there .. I have a compaq CQ61 

S/N CNF0079880 

Product WE089EA#ABU

Model  CQ61-402SA

The touchpad stopped responding.  I have had to uninstall/install synaptic driver as suggested by HP website. That did not fix it.  resorted to complete recovery to try and fix the problem which it did initially but I think the subsquent automatic windows update has returned the problem.  I have tried every thing I can think of but still having the problem.  Whilst the touchpad is frozen everything else works fine including the keybooard which I can use to navigate by .. very difficult thouhj

any ideas please

Thanks