I am using Avast and it never found any problems with settingsprovider.apk.
I have made a local.prop in /data with the following code in it
sys.keep_app_1=com.android.phone
sys.keep_app_2=com.android.contacts
sys.keep_app_3=com.sonyericsson.android.socialphonebook
sys.keep_app_4=com.sonyericsson.conversations
sys.keep_app_5=com.sonyericsson.textinput.uxp
Check it out and let me know if that works for you. It is supposed to keep those apps in memory. I reboot everyday but I'm gonna leave it running.
I'm still using my setup. Have tried Gin2KitKat a while ago but stapped back to Repack.
A few weeks ago my anti-virus discovered a threat in the rom (both Repack as Gin2KitKat) -> "settingsprovider.apk." looks to be infected somehow ?!
At the end of the year i'll probably buy a new phone.