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After doing an upgrade to an anti virus package (CA), on rebooting I have got a 'invalid system disk' error message. As I thought the upgrade to the antivirus has somehow corrupted my OS, I fdisk-ed the partion, re-formatted and re-installed only to get the same message.... Simile, with a spare drive I have got the same issues occur (the re-install always falls down when it re-boots and comes up with 'invalid system disk'.

The drives are PATA. I have 2; both are Western Digital with one being 120GB (WD1200JB) and the other 80GB (WD800), but currently I have only the 120GB connected (no jumpers). Both drives have at least 3 partitions on them.

I'm using a P4 2.4Mz with a single 512MB stick of DDR RAM and the Motherboard is an Intel D865GLC.

Any help would be greatly appreciated! thanx
 

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This error is the cause of your computer trying to boot to a non-bootable disk. Make sure all CD/Floppy Disks are removed. Make sure the boot order in your Bios is 1. Hard Disk 2. Floppy 3. Cd-rom.

Have fun :cool:
 

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I will take a look at that, thanks...

I found an article on the Western Digital site saying that the boot record of the boot drive is corrupted and that I have re-write the boot record with fdisk...
 

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jumper?

Also, be sure to check the jumper settings on each of the hard disks. I have seen a computer complain about a bad system disk when one of my disks was jumpered Master w/Slave, and no slave was present. Check that out.
 
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