I have the same concern , i would like to have more than one machine calculating hash's to the same account.
Is that possible?
I have other concern, if i like to move my bitcoin account to other pc , how do i do that? this situation applys to if i have some problem in the pc like, the hard disk burn , or a hard virus and i have to format , how do i move the account to other pc.
Thanks for reading
Im runing win7
Your wallet.dat file is all that is needed to be moved. It contains 100 hashes and your backup will be valid as long as you don't generate more than that after the backup.
A simple backup solution. Encrypt the wallet.dat and put it in dropbox or email it to yourself on gmail.