Commonly, some pupils / students don’t know exactly difference between BIOS and CMOS. I would to tell you, if BIOS is a program (software) then CMOS is a chip (hardware). Even both has same mean and intention but they are different. BIOS or Basic Input Output System is more referring to program that you are able to see on monitor screen. Yes, if you press DEL key when computer boot up to access CMOS, the program which able to be seen that is be in fact / exactly called BIOS rather than CMOS. Meanwhile CMOS or Complimentary Metal-Oxide Semiconductor is a chip which is put down integrated with Motherboard.

Registry such as we have known is big database which manage Windows running. By editing registry, and do a tweaking, you can improve windows performance. You can modify registry through Registry Editor or Regedit that you able to find in windows directory. But registry also can be misused by ignorant hands to bother the performance your PC, so that cause PC annoyed even freeze to work. To protect registry, please follow the step following:
1. Run regedit through Start>Run then step into key HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\Currentversion\Policies\System
2. Make a data DWORD by the name of DisableRegistryTools and fill in value with “0”
3. Back up registry (at the key), by clicking Registry>Export Registry File and give its name, for e.g. “Show”
4. Then return to the DWORD data, and change its value with “1”
5. Then repeat the step of 3 by giving the different name, for example “Close”
Now go out from regedit and try to run it again.
Windows will give message box expressing that you cannot edit registry. By this way, you can only open registry after you execute / run the file registry named “Show.reg” and protect it by running the file “Close.reg”.