It's normal to hang for a bit when loading the Safe Mode. As long as it gets to the desktop you're fine.
Slow running can be a symptom for a variety of issues. Use an antivirus program to ensure the system is clean that way. Run it several times in Safe Mode. Run a disk checker for bad sectors (from a command window launch chkdsk x: /f/r, where x is the OS disk/partition). LEt it run it's full course.
Run a defragmenter a few times (if this is an HDD, not an SSD). Also, run a disk cleanup (from HDD's properties/utilities).
Hit us back after you've done all that and let us know.
Thanks for the prompt reply. Glad to see it's nothing abnormal. I am a computer guru so I make sure I run the proper scanning procedures daily, but I'll be sure to run chkdsk and reply back with results later.