Alternatives to fix powershell error "execution of scripts is disabled on this system" -

i have power-shell script written me. try run power-shell script below;

ps c:\documents , settings\administrator>c:\test\test.ps1   

so giving me error saying file c:\test\test.ps1 cannot loaded because execution of scripts disabled on system. please see "get-help about_signing" more details.

i found setting set-executionpolicy unrestricted fix error.

but questions are;

1. what signing about?
2. can fix error without setting set-executionpolicy unrestricted? (doing signing kind of thing). if how that?
3. is there security issue arise if set set-executionpolicy unrestricted in web server?

set-executionpolicy causes system wide change. scripts possible security vulnerabilities, why script execution disabled default. 1 possibility launch powershell process command line execution policy in effect specific session. command line like:

> powershell.exe -executionpolicy unrestricted -file "c:\test\test.ps1" 

you combine signing leaving default policy restricted , launching powershell remotesigned or allsigned policy when needed. additional information on powershell.exe command line options here.