Hello, I did the procedure with the register as soundguruman suggested but I am still struggling. It won't read my dvd player, in real player it just says recycle and in Windows media player it asks to change the resolution but even when that is done it doesn't help.
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you should try the repair install of xp posted in this forum, sixth post from the top. the repair install restores default operations, and does not erase your personal files.