Originally posted by p38arover quad core I7 processor, SSD Hybrid plus several other drives for storage
I have LR 6 on two oldish PC's, and v6 runs OK.
Perhaps have a look into how your drives are configured. On my primary PC, I split what LR does over a few drives: the LR catalog lives on a SSD, as does the LR previews database (which always ends up with MILLIONS of files and folders in it); the program itself lives on the Windows system HDD; and exports go to a third internal HDD. Backups go to a 4th external USB 3 drive. Plus I usually get LR to check and optimise the catalog every time I exit.
If USB external drives are in your system, somethimes they can cause mysterious slowdowns and lockups across the system. One of my W10 PC's has a portable port-powered USB3 drive attached and it caused all sorts of PC startup and other delays until I figured out what was going on - it was often simply too slow to spin up. USB 3 drives with their own power-supply never had that issue, so it took me a while to track the problem down.
Sysinternals tools like Process Explorer, autoruns and TCPView can be useful in seeing what's contributing to system slowdowns.