Dear All, Salam!!! Well i am using CentOS release 4.3 (Final). From the start i installed the CentOs plus kernal; CentOS (2.6.9-42.0.8.plus.c4smp) I was facing the problem, that is system poweroffs, as this was happening randomly, but always found this problem in the night or even early morning. Also i assure you that system and all applications work normally in the office timings as i use to work on the machine and no problem can be seen, problem always occured in the night or in morning means after office timings. I checked; less /var/log/dmesg it says BIOS Corrupt. ACPI-0584: *** Warning: Type override - [DEB_] had invalid type (Integer) for Scope operator, changed to (Scope) I changed the kernel to; 2.6.9-34.ELsmp Well, system poweroffs too yesterday night, but this time no BIOS error in "dmesg" and second warning was there still; ACPI-0584: *** Warning: Type override - [DEB_] had invalid type (Integer) for Scope operator, changed to (Scope) I am not able to figure out the problem, if any one can help me???? Regards, Umair Shakil Askari Bank Limited -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20070907/ef54554d/attachment-0003.html>