If MSE is off and showing a red icon at startup, but it turns green/good on it's own after a short delay, you have a resource issue -- that is, other startup items are consuming processor power, memory, and disk access. All of this causes a delay in MSE fully starting up and successfully reporting status back to the operating system.
The other performance issues you are reporting can be due to all kinds of things -- a failing drive, low disk space, low memory, lots of background programs, even malware that has made it past MSE.
What are the specifications for this machine? What version of Windows is running? How old is the machine? Has the performance issue just recently surfaced?
-steve
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