I have a ESX 5.5 installed on my HP Proliant DL 180 G6 with a configuration of 8X Intel(R) Xeon(R) CPU E5540 @ 2.53GHz, 24 Gb RAM.
Recently the server has crashed four times, showing the Purple Screen of Death. Once this happens all of the virtual machines on the server stops and crashes until I restart this server.
I don't exactly know what causes this error, is it hardware problem?
Update: I forgot to mention that the operating system is 5.5 Update 1 and this is the image of the error