I would also try EWIDO.
Recently I've been having trouble with my Internet windows, and even certain game program windows etc. suddenly selecting and deselecting themselves. Even as I type this my window is deselcting and I'm unable to interact with it forcing me to reselect the window to be able to continue typing. This is very frustrating to deal with. I have Ad-aware and Counterspy both installed and have run scans multiple times only coming up with the same 3 items each time, I quarantine them but still it solves nothing. I really dont know what else to do, any help will be so greatly appreciated. Thank you.
As Retired suggests it may well be the work of a virus or other dastardly critter.
Antoher option you may want to check outis TweakUI free from Microsoft PowerToys for Windows XP. You'll find the download link in the left colum of the page along with free downloads for other goodies.
After installing you'll find TweakUI (it may be listed as Power Toys) in Programs. Open TweakUI and double left click on General then left click on Focus. place a check mark beside ''Prevent applications from stealing focus'', then click Apply, OK.
I hope this helps.
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