Antispyware:  

The antispyware features in Trend Micro Internet Security Pro are sufficient to keep you safe while surfing the net. By default, the software will search all incoming and outgoing email for spyware threats as well as watch for threats from your home or office network.

We were concerned that web mail from clients like Yahoo and Hotmail, and instant messaging attachments were not scanned by default, but the option is available in the configurations menu. We were also surprised that the contents of compressed files were not searched for spyware by default.

Antivirus:  

Trend Micro's antivirus scanner is a top-notch scanner that detected 100% of the viruses that we had planted on the test system during install. Its real-time scanner caught all the viruses we tried to create or introduce on the test machine as well. Our test machine was not slowed down by the realtime scanner in a noticeable way, though it did miss a few uncompiled virus files. Considering these files posed no threat to the system, this wasn't a big issue. However, the full scanner did slow the system down by an estimated 50% which was more than we expected. This may not make your computer impossible to use during a full scan, but we wouldn’t advise doing anything more than surfing the web or using a word processor during the scanning period.

One thing we really like about the virus scanner is that it updates every 3 hours by default. You can also change the update setting to update every hour if you wish. The updates don't require any user intervention and have yet to require a reboot.

We did notice one issue with the software that caused some concern. We performed a full scan on the system that the program didn't think finished. Because it did not appear to finish, the program would not allow updates. The only way to fix this was to reboot. This could cause problems if the problem isn't noticed.