ram issues?

There is no way to tell.

But this is what you should do!

Windows 2000 is set to reboot on a "hard error"

Boot to the safe mode

Right click the My Computer Icon and go to Properties.

Then go to the "Advanced" tab

Click the Startup and Recovery button

Uncheck "automatically reboot"

Now reboot - This will make the error message that keeps rebooting the computer stay on the screen.

Next, remove the new ram and leave the old ram in and reboot. Now you will know if the system thinks the ram is a problem.

Now remove the old ram and put the new ram in.
See if the computer will boot.
IF it does there is a conflict between the 2 different types of memory.

So dont mix them together.

I think this is the typical problem of an incompatible RAM module that cause the system to begin dumping the physical memory.
This means also that the additional memory could be defective. Check the list of approved additional RAM modules for the HP Pavillon 58806 after checkin the DIMM on another PC with the same OS.

well to start with a PC1001153 is crap its probs PC100 as the 1st bit of the product number says... PC100 is getting old 2 be honest and there should have been PC133 put in to match the processor.

you need to change the ram to PC133 for it to be compatible!

Hi there,
Firstly, HP Pavilion's have serious RAM Incompatibility issues. Make sure you use single sided memory not double sided.
In practical terms, I mean a DRAM module can be composed of either 8 chips on 1 side of the PCB alone or 16 chips with 8 chips on both sides. Also with HP, you will need your RAM set to the maximum frequency, not underclocked or overclocked & that MHz should be exactly the same as the Processor Front Side Bus.
Eg, motherboard may clainm to support both PC100 & PC133 or PC150 but you must use the exact RAM. I have a similar PC & have done a lot of experiments to come up with this observation
Of course, HP wouldnt agree with this. Hope this helps.

Regards,
Zubin