Upgraded to slower performance

[grendel25]

I just upgraded my 10.1 tab using Kies, and it is now version 4.0.4. But its responsiveness has plummeted -- slow to respond to all taps and swipes, and some keys produce double letters when typing, no matter how slow I type or how quickly I touch the keys. It's just SLOW, no matter what it's trying to do. Any ideas to help?

 

[B. Diddy]

Welcome to Android Central! Try booting into Recovery Mode and clearing the system cache partition. Follow the "Alternate Method" in this link, but instead of selecting Wipe Data/Factory Reset, make sure you select Wipe Cache Partition. Hard Reset - Samsung Galaxy Tab 10.1 SCH-I905