Quote: Originally Posted by event3horizon
If you haven't changed anything in the BIOS yourself since you got the PC, then it will not really change anything.
As said above, it will not adversely affect anything related to your system in most cases. The hope is that it will clear any memory corruption related to the BIOS. See How To Clear CMOS (Reset BIOS)
for more information.
If you have multiple hard drives inside the system and are running a RAID configuration, it will reset the RAID and could wipe the data, so backup any important data prior to resetting your BIOS if you have RAID. If you are unsure whether you have RAID, ask your manufacturer.