My RCA Venturer Saturn 10" pro began giving this fault," Optomizing app 1 of 1" every time I went to switch the thing on. I googled solutions like deleting the last programme installed or clearing the cache etc to no avail. I then did a factory reset but DID NOT include a four digit code. One of the google programmes tried to force me to include one (the document writer I think) but I refused and found one which didnt go online to access files instead. Since I did this the Optomizing app 1 of 1 has NEVER reoccoured plus I can install whatever programme I like and there is no faults happening.