Trend Micro Hijack This is a cleanup utility that can detect and repair registry files.

The user interface may not be visually attractive or have many features, but the program is pretty straightforward.

In the main menu you can perform a system scan and save a logfile, perform a system scan only, view the list of backups, open the miscellaneous tools section, open the online HiJackThis QuickStart, or just start the program.

A system scan is done extremely fast, and Hijack This opens a log file where you can observe technical details and then fix the problems. Unfortunately, there is no option to select all files, so it can take a pretty long time while selecting individual pieces.

Before repairing the checked files, it is highly recommended you do a backup on them or create a system restore point.

Another huge disadvantage of Hijack This is the fact that it can not tell you which files are vital to the operating system, and it suggests you use a third-party software to figure this out.

Once files are fixed (which can either mean repaired or deleted, but you can't choose the option), your computer has to restart. If you have deleted some essential Windows files and run a Hijack This scan again, it is very possible the program tells you there are some missing files.

Not to worry, because Hijack This automatically backs up your registry entries before deleting them (too bad it doesn't say so before). In the list of backups you can restore, delete registries, or add them to the ignore list (to be further ignored when Hijack This is performing a scan).

In the miscellaneous tools section you can generate a startup list log, open process manager or the hosts file manager, delete a file on reboot or an NT service, open ADS Spy or the Uninstall Manager.

Hijack This uses a significant amount of system memory, even when it's not doing a job.

Additionally, you can visit the Hijack This forums to find out more information about certain registry entries.

In conclusion, Hijack This is a decent registry cleaner, but it implies you take your time to find out what is and what isn't safe to delete from your system. It would had been much easier if Hijack This had incorporated an automatic function. But the program is free to use!