Yes it is.Ok, I uninstalled the program.
I'm currently using what came with the laptop - Microsoft Security Essentials.
Is that what you meant by security suite?
So how is the system booting now with the removal of the software?
I still stand by my recommendation that you leave the registry well alone despite what others may suggest. If Windows needed a registry cleaner it would include one with the os.
Most issues care caused by faulty device drivers or applications.
It might also be worth your while by looking in the event logs. I sometimes hesitate in suggesting this because the event logs can look like an absolute horror show when in-reality things aren't really that bad. Basically what your looking for is an event which looks like it might be linked and repeated often.
Also have a look though your applications and their age. If any have been installed for longer than say 6 months I'd check to see if a later version is available.