Hi, Yesterday my display was not comming. So I was forced to restart my PC many times from the UPS and from SMPS switch. After many times I got the display but it says CMOS Checksum Error. And it is asking for a Boot UP floppy. I don't have a Boot Disk for my Windows XP. What might be the problem ? Is the CMOS battery to be replaced or the BIOS or any problem with the Motherboard. Is my DATA Safe ? Where can I get BOOT Up Disk for Windows XP Professional from the Internet ? Thanx Arsenal.