Spyware Doctor protects your PC against:
- Stealthy spyware
- Aggressive adware
- Browser hijackers
- Malware Trojans
- Tracking cookies
- Keyloggers
- Dialers and other malware
Spyware Doctor has been written by PCtools, a global leader and proven expert in protection and privacy products for both Windows & Mac
Spyware doctor has different levels of protection. Following are some of the main features:
- IntelliScan
- IntelliGuard
- Anti-Virus (optional add-on)
- Threat Level Indicator
- Extra add-ons
- Smart Update
We’ve sectioned up Spyware Doctor into its key features, and for each feature given a usefulness rating.
Check out the usefulness ratings chart here»IntelliScan – Scanning on demand 
Much as you’d expect, this scans all files on your PC looking for infected files
Intelli-Scan checks the following locations on your system:
- Running Processes
- Startup Locations
- Browser Cookies
- Browser Settings
- The Windows Hosts file
- Windows Registry
- Active X Objects
- Layered Service Providers (LSPs)
IntelliGuard
IntelliGuard works by providing real-time protection. It monitors key system areas for suspicious or dubious activity. IntelliGuard constantly monitors your system as you work, maintaining optimum system security at all times.
Anti-Virus (optional addon) 
If at a later stage you decide you would like to bolt on Anti-Virus support, you can simply download the Anti-Virus plug-in which additionally protects against
- Viruses
- Worms
- Trojan horse threats
- Infections
Threat Level Indicator
Spyware Doctor provides an indicator system which reports of threats and then indicates how serious the intrusion is. The indicator fills from left to right depending severity
Extra Addons
Site Guard cleverly protects you from threats as you traverse the world wide web. It prevents infection from malware sites. It also protects any applications which connect to the internet, such as firefox or internet explorer.
Email Guard scans incoming and outgoing emails (pop3/smtp) and shields you from any malicious content coming you way!
Behaviour Guard, powered by ThreatFire™, protects your PC against zero-day viruses (ones which are yet to be discovered), spyware, worms, Trojans and other malware by detecting malicious activity.
Smart Update
Can be run automatically or manually to update the Spyware Doctor Database with the latest spyware antidotes and component updates.
Weak
Average
Useful
Very Handy
Staggeringly Utilitarian!
Version 6 of Spyware Doctor was developed with patented next generation ’sliding signatures’ technology
Sliding what?! This is special technology which delivers performance improvements to scan time and further reduces memory footprint and overall system impact during scanning. This means that you can continue using your computer while Spyware Doctor scans for threats silently in the background.
IntelliGuard will scan your system for any active malware or for malware that is set to activate at a later time.
Main features include:
- Browser Guard
- Cookie Guard
- File Guard
- Immunizer Guard
- Keylogger Guard
- Network Guard
- Process Guard
- Start-up Guard
IntelliGuard will display pop-up notifications whenever any infection is detected. Pop-up notifications are set to display by default but is fully customisable to your liking
Spyware Doctor keeps your system constantly protected against malware through its IntelliGuard real-time protection feature. IntelliGuard constantly monitors your system for any malicious behaviors involving spyware processes, tracking cookies, malicious ActiveX objects or browser hijackers, to speak of a few.
Individual infections are displayed with a coloured bar, which is filled from left to right, depending on the level of risk. Infection risk levels are summarised as follows:
- Suspicious
- Info & PUAs
- Low
- Medium
- Elevated
- High
Suspicious
These are files recognised as highly suspicious because they are packed with the same run-time compression that is commonly used by malware, so they could be threats. These files can be quarantined and removed.
Info & PUAs
These Potentially Unwanted Applications (PUAs) have some characteristics of malware, but possess no known risks. Typical characteristics could include: displaying low-impact advertisements or partially uninstalling
Low
Typical characteristics could include:
- Installing components without informing the user
- Returning non-sensitive data to other servers
- Displaying nuisance adverts in pop-up windows
Medium
These infections may cause inconvenience and may display misleading information. Typical characteristics could include:
- Presenting the user with a misleading End User License Agreement
- Displaying aggressive advertising in multiple pop-up windows
- Pretending to uninstall
Elevated
These infections may interfere with the use of your system or may be capable of capturing low-risk data, for example sending web browsing habits to third-parties for targeted advertising. Typical characteristics could include:
- No EULA displayed during installation
- Displaying unsolicited advertising
- Hijacking browser search pages
High
These infections may override user control of your system or pose high security risks such as capturing high-risk data for example, bank account details or passwords. Typical characteristics could include:
- Involuntary installation with no user interaction or control
- Hijacking browser home pages
- Hijacking browser search pages
- Returning sensitive data to other servers
- Automatically reinstalling itself following an uninstall
- Examples of these infections include keyloggers and dialers
Spyware Doctor covers all these bases, so once installed you should feel very secure and safe!