I've been obsessed with trying to figure out what was causing this. It's pretty annoying. HP told me to order a replacement unit and I did (it's coming tomorrow) but I wasn't convinced that this one was defective. After loading and unloading tons of drivers and doing 2 system recoveries, I determined that the WiFi card was causing this. When you turn off the WiFi (switch in the front) the problem goes away. I wish I tried that first before wasting hours troubleshooting. I don't know if every WiFi option does this but I have the Broadcomm a/b/g/Draft-N version in my TX1220us. Simply turning it off fixes my problem. Such a simple solution but took forever to figure it out. I hope this can be fixed with a future Broadcomm driver update or maybe I have a defective WiFi card. I'll see if it is defective when I get the replacement tx1220 tomorrow or if this is a problem across the whole TX1000 product line. I'd like to hear from others if this fixes the problem for them. To the couple of people who never had a problem are you using a different version of the wi-fi or not using the wi-fi at all? Now I can go to sleep.