I run up to six computers in my house. I turn them off or suspend them in order to save money and reduce my impact on the environment. I recently discovered a problem when doing this, though. I want to watch a television show or movie when I power on my HTPC. When I shut them off or suspend them most of their “lives,” all of the system health stuff runs at the same time I am trying to watch a program.

For example, I run Grisoft’s AVG antivirus software and Windows Defender. Both run on schedules and both can take a fair amount of CPU, RAM, and hard disk I/O resources. If you leave the machine off long enough, it’s possible to have both programs running at the same time.

This makes the rest of the system run slowly. This is particularly annoying when watching a 720p HD show via Boxee, which takes a pretty healthy dose of resources up on its own.

One of the design / cost decisions I made was to use the least expensive Core2Duo processor possible. I also tried to get lower-voltage processors, which use less power than their full-strength counterparts. Unfortunately these are at the lower-end of the horsepower spectrum. I arm each machine with 2GB of RAM, which sounds like a lot for a machine built a few years ago but will barely get the job done today. As such, I consider this my machines to be the “bare minimum” spec wise.

The hardware and price choices, combined with the anti-virus software, leads to a really sub-par user experience when everything is running at once.

This puts me in an odd position. I can leave the machines on all day, which uses more power but allows the anti-virus software to run on its preferred schedule. Or I can turn them off to conserve power but suffer the demands of PC health check plus multimedia playback.

I don’t have a solution for this yet. I think I may wind up running the downstairs computer 24/7 just because it has a higher probability of being used on a more regular basis. Unfortunately this is a trade-off I didn’t want to make, but having an HTPC that is usable when I want it is more important to me than a computer that is power efficient.

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