How do i update my bitcoin client, im running windows and have got the zip, and where is the wallet.dat file??
https://en.bitcoin.it/wiki/Data_directoryThe wallet is located
C:\Documents and Settings\YourUserName\Application data\Bitcoin (XP)
C:\Users\YourUserName\Appdata\Roaming\Bitcoin (Vista and 7)
And it is just download and unzip the latest zip file at
http://bitcoin.org/ and open bitcoin.exe
PS. Do a backup of wallet.dat