Bad user preference. How can I fix this?

My computer has been so slow (I've other posts about it). An effort to diagnose the problem was to run Onyx. It determined I had a bad user preference: "/Users/deborahmarlow/Library/Preferences/EROPref.plist:
stream had too few bytes".
Could this be, at least part, of my problem of such slow processing (when I am online)?
Does anyone know how to fix this bad user preference?
Thanks.

Thanks for the responses. I am on a another computer at 3:29 p.m. and have been trying to access this site and my post to read your responses since approximately 11:30 a.m. this morning. Frustratingly slow is an understatement. I am grateful that others are interested in helping me figure this out!!
What I've tried:
I have created a new user account but it is still very, very slow when logging in or opening anything online. I am working from this desktop computer trying to get the G4 laptop fixed. (I have posted 3 other questions that are all related to this problem if you'd care to look at them).
I looked at the site referred to above (re:preferences, plist) and am sure my problem is very similar, but, honestly, I have no idea what to do. I have tried to go to it to move it to the desktop but I cannot find it.Does anyone know how to find it? When I do find it, will it do any harm, potentially, to move it to the desktop? Should I try moving it? Will the system "replace" it with a correct file if I move it?
Could the wireless network I set up with an AirPort Extreme Basestation and card be what is making everything online sooooooo slow? If it is, it is only part of the problem because when I first went online with it it was faster... it was SOME faster, let me rephrase it. The user preference is involved somehow, I am sure I have more than one issue going on here.
I have been using Safari 1.3.2
Onyx was confusing when I used it and I've wondered if it "cleaned" something that shouldn't have been.
The AirPort network comes off high speed cable. Should I try to connect to the internet directly to rule out a wireless network problem? Does the wireless "bounce" off walls or go through them? If it goes straight then I have 3, maybe 4 walls between the base and the computer. If it bounces around then I probably only have 1 to go through.
I hope I've listed something that might give clues to the wise and knowledgeable out there to help me diagnose my trouble.... as I am panicked at not having my trusty laptop working wonderfully as it used to. My little "friend" is sick and I must get him better. Thank you for any insights you can offer!!
...debi

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Bad user preference. How can I fix this?

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