My co-worker was recently discussing how when she was online her Windows 7 freezes up. Although this does not happen too frequently, she said that if often happens on her laptop computer. She also told me that the issue becomes more pronounced when she uses the computer on the battery mode only. When she operates the laptop from the power source, she does not experience the freezing up. She is not sure if this is an issue with her laptop, or if this happens to others. If this issue continues, she told me that she would take her computer back to where she purchased it to have it looked at.