I’ve used avast! Home Edition for some time on Windows XP and Vista systems and am very pleased with its performance. Thanks to ALWIL for making such a great product available for free.
I also have an old 200 MHz Pentium laptop that is maxed out at 64 MB of RAM. This Toshiba machine gets only occasional use and I keep it around only as a guest PC for accessing the Internet. It runs Windows 98 SE (the best it can do in the Windows family) and I would like to load avast! Home Edition on it so that there is on-access protection when users access the Internet. Despite the indications that avast! only needs a 486 processor with 32 MB of RAM to run, avast! slows this system so much during startup and VPS updates as to render the machine unusable.
To give you an idea of the performance hits I see, I have timed the boot process (with the machine disconnected from the Internet to prevent an update check). Here is what I experience:
(1) From power up to the Windows 98 desktop: less than 1 minute
(2) From appearance of the desktop to the System Tray icons (except for avast!): less than 1 minute
(3) Appearance of the avast! blue ball in the System Tray: 12 minutes!
During the 12 minutes it takes for avast! to eventually load, the hard disk is accessed almost continuously, during which time the system is very unresponsive to any user activity. Eventually, after avast! loads and the system becomes stable, performance improves to an acceptable level. Typical scan time for the hard disk seems about right (15 minutes for a lightly loaded 4 GB drive).
Response is even worse if avast! detects and installs an updated virus signature database. This process typically takes 30 minutes or more to complete.
I have tried a repair, and a complete uninstallation (including running aswClear.exe) with reboots in between, with no improvement in performance after reinstalling. With avast! uninstalled, performance is what you would expect for a machine of this type. It boots completely into Windows in less than 2 minutes after which it is ready for use. I am trying to load the latest avast! version (4.8.1335) but I have also tried the last 4.7 version (build 1098) with identical results.
The Windows 98 SE installation was done as a clean install. Aside from the operating system itself, the machine has few applications installed, none of which run resident. There is no firewall installed, nor has there ever been any antivirus installed other than avast!
I don’t want to give up on avast! completely and would prefer not to rely on an on-demand scanner (like ClamWin) only. Any suggestions for what else I might try would be appreciated.
Thank you.
Ray