I am currently using WormGuard on a 30-day trial period. Everything seems to be normal so far but a recent thread here at wilders commented upon a possible drain on system resources by WormGuard. 1. Can Wormguard drain system resources? I have seen little evidence of this on my Pentium 3, 1.2GHz, 512mB memory laptop. 2. I run XP Pro without the service pack. Is WormGuard 3(&4) fully functional/ stable on XP without SP1? Due to past experiences with service packs I am relunctant to install SP1. 3. Would you recommend waiting for WormGuard 4 to appear before purchasing for a XP system?