I really need to fix this. I plugged my iphone into my laptop, and it said "invalid response received from iphone" It's fine on my HP Mini, but not on my Dell Laptop. Specs: Laptop: Dell Inspiron 1545 XP Pro 32-bit Latest iTunes. I've tried older versions of iTunes, I made sure everything in msconfig was correct, normal boot, all services start on startup. I've been in services, everything to do with apple/itunes is running. Tried system restore. Looked for lockdown folder... there is none. What else should I try??????????