Old Version of HijackThis 1.98.1
Selected Version
HijackThis 1.98.1
Supported Systems
Legacy OS support
Windows 95, 98, 2000, XP, Vista, 7
Release Date
01 August, 2004 (17 years ago )

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Download HijackThis 1.98.1
HijackThis 1.98.1

HijackThis 1.98.1 (181 KB)

okay 46 scans reported this version clean

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System Requirements of HijackThis 1.98.1
  • Windows 98
  • Windows NT
  • Windows ME
  • Windows 2000
  • Windows XP
  • Windows XP x64
  • Windows Server 2003
  • Windows Server 2003 x64
  • Windows NT 4.0
  • Windows 2000 x64
Program Information of HijackThis 1.98.1
Version Name:
HijackThis 1.98.1

File Size:
181 KB

Released Date:
01 August, 2004 (17 years ago)

MD5 Checksum:

SHA1 Checksum:

Version History of HijackThis 1.98.1
  • Changed the MD5 hashing module to use the MS Cryptograpy library, making it 11 times faster!
  • Fixed O18 items not being removed.
  • Fixed IniGetString() error #5.
  • Fixed MakeBackup() error #75. Added a bunch of items to…

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HijackThis Screenshots

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About HijackThis

HijackThis can either save this info as a plain text logfile or disable the found items. Caution should be exercised when using the latter option, as HijackThis does not discriminate between legimate and unwanted items - thus allowing a user to unintentionally disable important programs from running, which may possibly cause their system or peripherals to stop working. HijackThis will, however, create backups of the files and registry entries it removes, which can be used to restore the system in the event of a mistake.

A common tradition is to post the logfile to some web board/forum where more experienced users will help decipher which entries need to be removed. Automated tools also exist that analyze saved logs and attempt to provide recommendations to the user, or to clean entries automatically. Use of such tools, however, is generally recommended against by those who specialize in manually dealing with HijackThis logs; they consider the tools to be potentially dangerous to inexperienced users, and not accurate and reliable enough to substitute consulting a trained human analyzer.

Later versions of HijackThis include additional tools like a task manager, hosts file editor and alternate data stream scanner. HijackThis is property of Merijn Bellekom .

Updates : HijackThis Updates

Did You Know?

HijackThis inspects your machines browser and operating system settings to generate a log file of the current state of your computer.