Wut? they ask you to send the HDD or the whole pc? I'm confused about your no period specs...
It seems to be a CPU issue for sure, read https://www.reviversoft.com/blog/2013/01/clock-watchdog-timeout/
"Simply put, it’s your processor. Or, as you often hear it referred to, your CPU.
The CLOCK_WATCHDOG_TIMEOUT error means that your processor is having trouble with cooperation from its cores and threads. Threads are tasks taken by cores, and some cores can take many threads simultaneously. The problem here is that a thread is waiting for a proper response from another thread — or a core is waiting for a response from another core — and those responses aren’t coming. Therefore, you get this BSoD error."