[Android Central Question]

Optimises apps and returns to the "liquorice all-sorts" than repeats, non stop

[B. Diddy]

Welcome to Android Central! What do you mean by "liquorice all-sorts"?

Is this the 1st or 2nd gen Nexus 7? Try booting into Recovery and wiping the cache: http://forums.androidcentral.com/goo...tion-wipe.html

[Rukbat]

And if that doesn't work, try reflashing the firmware from https://developers.google.com/android/images#razorg.

If the bootloader is already unlocked, remove the -w from the last fastboot line and it won't wipe your data. (If it's not, unlocking the bootloader will wipe your data anyway.)