PC-Cillin is a suite of computer security software by Trend Micro Inc. covering the following security processes:
Anti-virus (including real-time scanning)
As of 2007 the application sutie was renamed Trend-Micro Internet Security. Since then the PC-cillin brand has not been reprised.
Minor version of the software. The features of this edition (PC-cillin 2000) are as follows:
Windows XP Support! PC-cillin now supports Microsoft Windows XP, and retains backward compatiblity until Windows 95.
Virus Scanning of POP3 Email If you use Microsoft Outlook Express 4.01 or above or Eudora Pro 4.0 or above as your email client, Trend PC-cillin 2000 will scan your email messages as they download from the POP3 server. Virus-infected attachments are stopped before they ever reach your computer!
Virus Scanning of Local Outlook Folder If you use Microsoft Outlook as your email client, Trend PC-cillin 2000 provides on-demand scanning of local folders for virus-infected attachments. Trend PC-cillin will automatically detect an installed copy of Microsoft Outlook on the computer and enable the user interface elements that permit the use of this feature. Please note that this feature does not scan messages stored on a Microsoft Exchange server, but only scans messages in local folders.
Internet Intelligent Auto Update PC-cillin 2000 now can auto detect the Internet connection and check the pattern/engine/program version number in Trend's server. If update is necessary, it will prompt you to download the update files. All update activities take place in the background, and you don't need to keep checking the availability of new anti-virus component any more.
Incremental Virus Pattern Downloads No longer do you have to download the entire virus pattern file when updating your software. Trend PC-cillin 2000 supports incremental pattern updates whereby only the virus patterns that have changed since the last update are downloaded. This greatly reduces the download time, saving time and expense that you have to spend on Internet connection charges.
Resume Download for Update Process Whenever the download process for the pattern/engine/program update files fails, the next download can continue from the breaking point to resume the download. If there is a newer version in the server after the download process has failed, it will not be resumed, and the whole file will be downloaded instead.
PCSCAN Command Line Scanner Supports Pattern Files Larger Than 1.44 MB Due to the large number of known computer viruses that have been identified, the virus pattern file is now too large to fit on a single 1.44 MB diskette. The emergency rescue disk creation utility can now split the virus pattern file over several diskettes. Additionally, the "PCSCAN" command line scanner supports virus pattern files that have been spanned over more than one diskette.
Trojan System Cleaner PC-cillin now integrates the Trojan System Cleaner (TSC). TSC is a Win32 program that detects the activities of live Trojan viruses, recovers system files (e.g., registry, win.ini, wininit.ini) that are modified by Trojans, kills their processes, and deletes files dropped in. TSC support is transparent to user (if no Trojan viruses are found). PC-cillin will launch TSC whenever Real Time Monitor isstarting up or after an update. PC-cillin launches TSC.EXE to check/clean Trojans first. If TSC detects a Trojan virus, a message box appears to inform the user that the Trojan virus has been cleaned.
The software is licensed, and is usually purchased at a computer retailer however the copy used for testing features an OEM license.
Software Name: PC-cillin AntiVirus 2000 Software Version: 22.214.171.1246 Release Year: 2001 Developer: Trend Micro Inc. Publisher: Trend Micro Inc. License Type: Retail License OEM License  Installation Method: Install to Local Disk
Below are the system requirements (sometimes referred to as the minimum system requirements) that the software developer or publisher stated at the time of release.