I bought a HP Z400 workstation in 2010. It supports a two-port USB 3.0 card which I had installed until recently. It was the one that HP recommended. However, it stopped working and I removed it and replaced it with an Anker 2-port card.
However, the PC is now very slow when booting. The power button lights up, but the screen remains black for up to 1 minute and only then does the normal boot process begin by showing the option to enter setup or choose a different boot source. Logging on to Windows is also rather slow and the same applies when shutting down or restarting.
Are there any suggestions as to how to cut down these delays?