BAD_POOL_HEADER and MEMORY_MANAGEMENT

I sent my HP ENVY 6 1010us into HP at the beginning of December due to hard drive issues it was having, and it came back about a week ago with new problems.

I've been getting these Blue Screen errors, and the diagnostics run have said there's a problem with my memory.

However, my laptop is now out of warranty, and I'm afraid it won't be covered by HP.

Thanks.