Computer type thing "frozen"

[JamieP]

How would you say "it locks up and reboots"

I've got a new android box that will freeze up and then reboot.

[KhunBENQ]

Freeze (hang): อาการค้าง (akan khang)

Reboot: the pros simply use the English term (written in Thai: รีบูต).

Alternatively you can use "restart": เริ่มใหม่ (roem mai) or

machine restart: ปลุก เครื่อง อีกครั้ง (pluk khrueang ik khrang)

Sources:

Thai Wiki about computer freeze: http://th.wikipedia.org/wiki/%E0%B8%AD%E0%B8%B2%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%84%E0%B9%89%E0%B8%B2%E0%B8%87

Google article about reboot into safe mode: https://support.google.com/nexus/answer/2852139?hl=th

Description of reboot: http://dictionary.sanook.com/search/dict-computer/reboot

(I use RTGS transcription, not suitable for English natives, look up the dictionary for pronounciation)