After all the hassle of will I, won't I, go to wireless/ethernet, I've finally gone for ethernet and have changed my antivirus too-all seems to help.

I've moved the router downstairs plugging it directly into main point, fitted ethernet-20 mts! but still had slight probs, so have changed antivirus too and seems much better now.
I spoke to a good techy via phone and was told that AVG works with the XP system better than Avast that I had on, so taking his word have changed it. I used to use avg years back -any comments on that antivirus at all peeps????

Sorry it got soo boring, but thanks all who helped me with their suggestions.