Instruct: Classify a given review into positive or negative sentiment.
Query: Does not work with my PC - Incompatable - Very Upset

I ordered "compatable" DIMMs for my Dell PC to upgrade the memory. My machine will not boot up with both installed or one installed in either DIMM slot. I hope I can get my money back. I wish I could talk to someone at Viking to get an explanation.I purchased through Viking because Dell does not appear to sell these any longer. Very unhappy.