If your computer starts up slow, what is the best reason why?

The most likely culprit that your computer assuming it's current with sufficient RAM is bloatware and programs that automatically load.

Check the registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run.

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

Also, use task Manager to find the programs (see attachment).

answer; ///400 ibs;