Report "Two years ago I bought a used computer and a legimate copy of XP SP3, which I took to the repair shop (where I bought the computer) for installation. The shop used their own installation disk. (Because the installation was faster??) Now I have several problems and pop-up windows that say insert the XP disk and run Repair. Then I get the message that the product numbers do not match. I used a utility to change the product number, but still get the same message. I will appreciate all suggestions, and Thanks in advance! -- Hipockets"