win95 error after Vredir.vxd patch loade

We have an NT 4.0 network running win 95/98 desktops. We loaded Vredir.vxd patch from Microsft for win 95 machines because we had problems running Aceess97 datbases and we found this may be the fix?? Some of the machines are comming up with Windows (blue screen) errors on startup. They happens randomly and not everyday? A few machines are ok. More than half are getting blue screen everyday? All have Win95 B loaded? What can I do to fix this problem? Can I uninstall a Microsoft Patch? or istheir a fix?