How to open a ECM file

There is a free program called unecm.exe to open ECM files. Just drag and drop the ECM file on to the unecm.exe icon. Then it will decode the file. unecm is a application which is used to decompress the ECM files. Usually converting a 600MB file to a ECM file format will reduce about 100MB (i.e. the file will become 500MB size). Roughly, converting a normal files into ECM will reduce 16-17% of the actual size.


CMOS checksum error – Defaults loaded

When the computer boots, if that error is displayed, that means there is a problem in your CMOS battery (A battery located on the motherboard to store the system date, system passwords etc.)

Warning! CPU has been changed or CPU Ratio…

Above warning is also displayed along with this error because the system boot exactly can’t identify where the wrong, actually is. You must press F1 key in order to continue, after that message is being displayed.

You can ensure whether the wrong is with the CMOS battery or not, by setting the date and time in Windows. If the date and time remain correct after you switch on the computer again, that means your CMOS battery is working properly. If the date and time is reset to the default date and time when you switch on the computer that means the CMOS battery is not working.

I think it’s a good idea to write another important fact about CMOS battery at the moment I’m talking about it. You can reset your system passwords by removing the CMOS battery and then replace it after a while.

If you feel the error is not with the CMOS battery, you can try to resolve that problem by updating BIOS.