RegistryProt 

RegistryProt is a free, compact, realtime registry monitor and protector, that adds another dimension to Windows security. By monitoring important locations and keys in the Windows system registry, RegistryProt alerts you to changes immediately.
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TrojanShield 

Use Trojan Shield to protect yourself from hackers and Trojan viruses. If a hacker tries to break into your computer, Trojan Shield automatically warns you so you can take action against them.
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