Because Windows 7 requires digitally signed drivers PG2 will not work out of the box. But the information provided on PG2’s instruction page is outdated pertaining to the RC. The solution?
Driver Signature Enforcement Overrider – a program by NGOHQ for dealing with this pesky annoyance. The recipe requires two ingredients: DSEO and pg2-rc1-test2.exe – Firstly you must enable TEST MODE in DSEO, and reboot your computer. Following the reboot, install PG2, but do not launch it; instead, navigate to its install folder (C:Program FilesPeerGuardian2) where you will see “pgfilter.sys”. This is the unsigned driver, to sign it use DSEO’s sign file option, manually add the path for pgfilter.sys, and press OK. Now type “bcdedit /set loadoptions DDISABLE_INTEGRITY_CHECKS” in th e run box (start>run) without quotes. Now you can launch PG2 with no problems!
If you find yourself having to redo these steps every time you launch PG, check out Vista RC Loader.