So you set your CPU to 1.22 Ghz and checked 'set at boot'. You enjoy your 10% speed increase until suddently you get a random reboot. You know it is because you set the CPU too high (for your phone, every phone is differnet) so you wait for it to reboot so you set it back but then BAM! another reboot. Now Sh!t hits the fan because of the 'set at boot' flag has been checked. You didn't do a nandroid backup recently or you don't have any set up. What to do??
I found this on android developers forum and thought I should share this in an OP because it's very valuable for us overclockers.
Basically, to remedy this, you need to delete the SetCPU config file from the internal memory. To do, follow this:
1) Boot into recovery
2) Connect USB
3) open ADB shell - 'adb shell'
4) mount the Data folder - 'mount /data'
5) navigate to the Data folder - 'cd /data/data'
6) Remove the config file - 'rm -r com.mhuang.overclocking'
7) exit and reboot phone
Now you should be all set. SetCPU is now in its default form.