Best place to obtain malware free stock ROMs

Newby question

Hello, folks, where is the best place to obtain malware free stock Samsung ROMs? There are two sites I've seen with stock* ROMS for my carrier, buy I'm not sure how safe they are? I've searched the forms and can't find a concise listing of the best sites to obtain stock ROMS from. Two sites I've see that I'm curious about are:

Samsugupdates.com.* &
Sammobile.com.

Any help will be appreciated. Tx

replacement place? recalled tablet

Hi guys I didn't know where to look this up at I wanted to know if I can return my old recalled tablet because the store I bought it from will give me store credit for the old recalled tablet just want to know if I need to do anything on my new tablet for it still to work after returning the recalled one don't care if it locks up or anything because I won't have it it anymore through the replacement plan warranty or do I have to send my old one to Nvidia just wanted to make sure my new one will still work after returning the old one anyone have this come up or here if I can't even do that thanks for any help haven't activated my new one yet wanted to check on here first to see if it's okay I did to do thanks for any information. And if I have to just send the old one in I wonder if they can transfer my warranty to the new one? Just in case it is wrong to send in the old one feel kind of bad doing that feels like dishonest thing to do

Marshmallow users, what are you running in place of app circle bar?

Hi guys, I've been running DU as my main ROM for quite some time now, but I'm itching to move to Marshmallow. I've been playing with it a bit today and I'm really enjoying it.
One thing I've noticed though is that none of the ROMs currently available have app circle bar yet, which I rely upon a lot.
Do any circle bar users that have moved to marshmallow have any recommendations for an alternative?

Can someone guide me to right place ? i have question how fix error on Lenovo s860

I bought Lenovo s860 from my friend, he bought it for selling purpose. He said that it gives error then setting up time and date. How to fix it ? Can someone provide me some tutorial how to Flash stcok rom for Lenovo phone ? or how to restore lenovo phone if it's bricked. I don't wanna do any trying to root, install recovery because if i screwup it i won't fix that phone by myself By the way i bought it for my mum as present but i don't wanna give her faulty present.