Could anyone let me know, what is command to reboot computer not to restart miner if video driver failed and i get very low hashrate after?

I have this line in *.bat

EthDcrMiner64.exe -wd 1 -r 1 -epool eth-eu.dwarfpool.com:8008 etc... but it doesn't help, after driver failed, rig keep going calculation low speed (0,5-8mhs on each R9 280x) before it's rebooted myself.

command -r >20 restarts miner, but it still low hashrate and i need reboot.

Assistance please.