Ok, those are two good reasons for the slowness of your comp then, can't be helped. Ok, I am just giving you the standard Sping clean up steps, which should return you a lot of performance. But high security and quick performance are at odds with each other here.
Last question to clear something, was it working better at some previous stage?
Anyway good luck with the spring clean, it takes quite a long time but is worth it in the end.
Time to use your "runbox" to clean your computer,
(all these steps are done with the run box then)
find and press the keys; the Windows flag botton and the R botton together(up pops the runbox)
(all these steps can be simply done by typing commands in the run box then)
Step1 deleting the prefetch files
type, or cut/paste this to runbox: prefetch
(the prefetch folder opens)
press: Ctrl botton with the A botton(select all is the same)
press: shift + delete botton(deletes with prompt)
Step2 disc clean up
type or cut/paste this to runbox: cleanmgr.exe
choose drive(normally C: but comps differ)
press: enter(this process can take a long time)
Step3 disc defragmenter
type or cut/paste this to runbox: dfrg.msc
press enter(this process can take a long time)
type, or cut/paste this to runbox: chkdsk /f /r
press: enter( black window appears)
press: Y botton
reboot the computer(this process is the longest, worse the screen may be lost before hours later the computer arrives at the welcome screen)
Step5 download: clean up.
Step6 Start ups
type, or cut/paste this to runbox: msconfig
mousemove to: start ups
keep; antivirus related and wanted entries
check: unknown entries
disable: ones you are sure are unneeded.
Good, although this has taken you a long time, I think your computer will thank you for it, and goblins love comps.