missing .ini and vxd files

trying to upgrade win 95, found missing files, ie: vnetsup.vxd,ndis.vxd,ndis.vxd,vnetbios.vxd….went to win help tryed to restore in msdos mode did what it told me to do which was type in these commands, attrib hrs system.dat,attrib hrs.da0,etc… so can you help me to find how to put these files back in there…thanx…