Computer wont start after installing new ram

[jack_112]

Recently I've added a further 8gb (1 stick) to another exist 4gb stick. When I booted up I went to startup repair, then got a message saying 'disk error-any key to continue' and that goes on a constant loop.

I have an HP prodesk with 3.5ghz intel i5 CPU and upgraded it with a Crucial 1GX64 DDR3 1600 UDIMM 240-PIN ram stick, unsure of the mother boards model.

I am not the best at this sort of stuff, but I've been scrolling through this website looking for a solution.

 

[digitaldoc]

Remove the new stick, and the computer should boot.

Adding an additional stick of RAM does not consistently work as the RAM sticks may not be matched. This is why RAM kits get sold,and they match the sticks at the factory to insure compatibility.

 

[bhagu220]

Your OS is damaged.
You need the repair disk or you need to install new OS.

 

[X79]

As the others said, you need to buy RAM in kits to ensure compatibility.
Also, which OS are you running? You might not be able to use much more than 4GB RAM, actually.