ktriebol :
Are you seeing the same issue on all ten machines? If the problem only occurs on some machines, you could try a malware scan. I don't see any legitimate reason why the laptop HDD machines should be noticeably slower.
Yes all ten. I have timed two of the WD2500BEKT drives, a WD5000BPKX, a Hitachi 500GB, and a WD desktop, twice each, with the same fresh copy from an image (a fresh load of Windows 7-64bit-HomePrem., plus windows updates, plus drivers for MBD components, and drivers for GF650TI) So it is unlikely there is a malware issue, since the images are identical and only the drive model is different.
From power on to the "Welcome" is about 30-35 seconds on other drives, while 50-55 seconds on the WD2500BEKT ... to show the desktop while the WD2500BEKT was right around 80 seconds (1:20) the others around 50 seconds. So we are talking about roughly 155% difference in performance.
Western Digital is basically saying I should expect lower performance due to the drive being older (it is from Sep 2013) and unfortunately is no longer being produced so has reached it's End of Life, and will no longer get new firmware updates. The drivers for the Intel Rapid Storage Technology, drivers for the chipset, Motherboard BIOS, and firmware for the drive (there was no updates) are all the latest. Wireless drivers are installed but no connection to a WIFI router has been established so there should be no network activity/searching for online driver updates etc happening that might add to boot times. Two perfectly identical PC's show similar slow times for booting for the WD2500BEKT, and similar faster times when comparing the other drives in the two systems. So it is not specifically the hardware as two PCs, and two drives have the same symptoms. It could be a compatibility issue. It could be a problem with the software load, but would have to be something that only affects the slower drive. It could be a performance issue with the drive, being a lower spec'd lower performing drive than the drives I am comparing to, but 150% difference would seem unlikely between one generation of drive and the next. All of the drives are 7200RPM, however only the WD2500BEKT is SATA2, the others are SATA3.