There are two ways to go - one is ActivePerl from http://www.activestate.com. This one comes as a Microsoft Installer Package, and most likely requires administrative privileges to install. ActivePerl is good, ActiveState has many Win32 ports of Perl modules online.

The other solution is IndigoPerl (http://www.indigostar.com/indigoperl.htm), which comes together with a built-in HTTP-Server, which could be suited more to what you want to use Perl for, Web development. IndigoPerl comes (last time I looked) as a plain .zip file with some small installer, that dosen't need administrative privileges.

Both ports of Perl are equally valid, but IndigoPerl might be more suited to your needs. Both installations should be (other than maybe the administrative privileges and the reboot to update autoexec.bat (not really necessary)) relatively painless.

This question could also already have been answered by visiting the Outside Links page, which should have been found by Super Search, but I don't know which would be the right keywords :-).

Update: Contrary to other claims, the IndigoPerl link is still valid and the file can be downloaded at ftp://ftp.indigostar.com/pub/indigoperl-5.6.zip.