Invalid system disk error.

try putting in your win95 emergency startup floppy in before boot up when you get to the command promt type in A:\sys c: if you get a "sytem transfered" message take out floppy and re-boot, if no message or error message run Scandisk from the emergency boot up disk

1)You may be using a non bootable system disk,you will need the boot disk
2)It may have not copied the required system files,which could have been caused by physical errors caused by the hard drive.
Using the boot disk,at the dos prompt try running scandisk to check for drive errors.

OS is missing or system files are corrupted. If you boot from a floppy, change to C:\ and still cannot access your HDD and you tried the suggestion in the first answer you may have to reformat (if the partition is still there) and fresh-install Windows.

All the suggestions offered are possibilities
A few others would be to make sure your bios
is detecting your hard drive.If you made hardware changes, make sure your drive jumpers are set correctly.
You could also try fdisk /mbr at the dos
prompt.If you run fdisk it should show your
partitions and also if your c: drive is set
to active.If fdisk does not detect your drive then you have a hardware problem.Make
sure you did not reverse your hd cable.On some machines you can do that either onthe
mother board or the drive.Also check to make
sure the hd cable is not shifted on the motherboard hd socket.

Since you still can't access the Hdd even after booting from a floppy, I would say your PC isn't recognizing the HDD in CMOS. Go into CMOS and verify the settings match your Hdd, if not make the necessary changes manually or try auto-detect. Then reboot and see if it boots OK. If not or your settings were correct for the Hdd, you actually have a bad Hdd. You don't state whether or not you have a controller card or if it is integrated into the motherboard, but it could also be the controller.

I have used this machine...

If all of the suggestions previously have failed, you may want to check a few other items. If the GX1 is using a Western Digital HD, you may consider going to their site and picking up a copy of their Data Lifeguard tools. This particular program boots from floppy and can diagnose a myriad of features on their hard drives.

Hope this helps.

More than likely it is a hard drive failure. I have had a few on the gx1's. The company is real good about replacing them if thyere still under warranty

Ok all the replys have been good, but!! if you set the cmos to auto detect for harddrive and it finds the drive great but that could mean the cmos battery is bad or going bad, they only cost a few bucks and could save alot of trouble shooting.

When I see this message on a computer for me is suspicious to be virused (except hardware problems).
I suggest you follow this steps in strict order:
1.Make sure you have an unsuspicious floppy disk boot with the same version of operating system. In addition, make sure you have on disk:fdisk.exe,sys.com
2.Boot your system from floppy disk.
3.Type and press
4.Turn off your computer.
5.Boot again your system from floppy disk.
6.If you have another floppy disk with an antivirus, scan your system.
7.Put your boot disk in floppy and type and press
8.If previous step don't work type and press .Attention how use fdisk.From menu select; view partions.If you don't see anything you have a big problem.
9.Sometime, I successfully recover the partitions with old dos application ndd.exe.

Do you have more that one HD if so one needs to be master and one as slave also check the jumpers on the HD and CDROM make sure the HD with 95 is the master.

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