AVG uses 100% of CPU even when not scanning

I too am having a probem with AVG using 100% of the CPU. Started having problems after upgrading to ver 9.0.725.

Everything takes a long time to do, as in minutes not seconds, webpages stall, or crash, script errors frequently. One script error message: chrome+avgp content avg abgbapt.js:125 This may not be exact, tried to catch it before it was gone.

Custom built Pen 4 2.60 GHz, 1 GB ram, Win XP Pro SP3, use Mozilla browser, updated to most recent version.

I'm ready to toss the computer thru the window! Any suggestions on how to resolve the problem would be greatly appreciated.