Quote from: Asrael999 on July 01, 2013, 11:41:38 AM

if memory serves there may be an issue with GUIMiner pointing at Slush's pool. I am not sure it has been updated to the current address.

try selecting other - then enter stratum.bitcoin.cz and port 3333 to see if you can get a connection that way.

72 MH/z is about right for a low spec 5670

I tried stratum.bitcoin.cz and port 3333 in GUIMiner, no errors so far.
Thanks

edit: Spoke too soon Sad

Code:

2013-07-01 20:09:19: Listener for "Default": stratum.bitcoin.cz:3333 01/07/2013 20:09:19, Verification failed, check hardware! (1:0:Redwood, 8e454765)