While the term spyware suggests software that monitors a user's computing, the functions of spyware can extend beyond simple monitoring.
Spyware can collect almost any type of data, including personal information like internet surfing habits, user logins, and bank or credit account information.
Better still, Spyware Doctor now supports 64-bit versions of Windows.
On our test system, a fairly weak laptop with a 32-bit installation of Windows 7, Spyware Doctor installed quite easily.
Purchasing Malwarebytes would be an option if the PC gets infected with rogues and trojans constantly, but has no other parasites. Although Malwarebytes anti-malware, Super Antispyware and Spybot all offer free removal, Malwarebytes anti-malware is more specialized for malware and rogue parasites, while other 2 are more generic.
Also, Spyware doctor has the largest database by far, offering the best chances to identify parasites. Tech support people might lean towards programs offering free removal, while others would use programs providing excelent removal rate and good protection.
In an increasingly competitive market, Spyware Doctor has managed to remain one of the most successful anti-spyware products.
It adds support for 64-bit versions of Windows Vista™ and Windows™ 7.
All tools offer many of similar capabilities, for example scheduler, quarantine, custom scanning (except Spybot S&D due to its scanning method).
Comparing full versions for PC cleaning and protection, I would recommend using Spyhunter.
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Spyware is software that aims to gather information about a person or organization without their knowledge, that may send such information to another entity without the consumer's consent, or that asserts control over a device without the consumer's knowledge.