I replaced the Cmos battery approx. 3 weeks ago and after that time problems with CPU frequencies started to create problems during boot up. I was able to get around the problem by manually correcting the CPU Frequency setting on the Bios screen. I have goggled this problem and have found many different suggestions. To date I have not one anything as most suggestions I have received after using Google come with warnings that will make my computer completely useless. I entertained thought of rebooting Windows XP Home but realized that would not correct Bios problems. Tell me more about resetting cmos. Thanks.