I have Windows XP on a compaq Presario laptop, and apparently, every time I log on, there's a pop-up telling me that a file is missing. It says that gzmrotate.dll is missing, and it tells me to recover the file with my windows XP disk. But, the problem is, my laptop had windows installed on it at the shop we got it from (best buy) and I don't have the windows XP disk. So, tell, me. How important is this file? And what should I do?