Windows 7: Best free HIPS with minimal resource usage?

Does anyone know a good free HIPS (host-based intrusion prevention system) program that uses the least amount of system resources possible?
I used to use ZoneAlarm back in the day (it had a neat "OS Firewall" feature which basically does this) but I'm not really a fan of ZoneAlarm nowadays.

They all will use a lot of resources...but Comodo offers one...

Aww well that sucks... any good standalone ones? I already have an antivirus solution in place that I don't want to replace.

You don't actually need an HIPS.

I would suggest an anti-executable instead. NoVirusThanks EXE Radar Pro - NoVirusThanks has both a free and life time paid license version. They are both extremely light on resources and are easy to use.

What exactly does it do? (the anti-exe stuff)

I didn't mean to hijack your thread, but here's the short of it. An anti-executable such as EXE Radar Pro/Free simply prevents any .exe from launching without the user either allowing it once or white listing it. This stops things like web based drive-by's or clicking on an add that is really an .exe or even a double extension like a .pdf.exe, where you think it is a simple pdf file, but it is really a malicious .exe.

Does it check for file integrity? (i.e. if I allow firefox.exe, and a malware sample renames itself firefox.exe, will the program allow it to pass?)

Yes, it checks the MD5 hash.

And so basically it's like the old-school firewalls where initially I have to confirm literally every exe that wants to run?
What happens if an exe wants to run but I haven't confirmed it, and because of my delay in allowing it to run, it crashes? :P