windbg .kdfiles target windows 7 over 1394

I currently have a problem, that my target system is windows 7, and use latest WINDBG to connect the target over 1394,

then when i .kdfiles , during copying, i got this error

This is NOT a break in update time
This is most likely a BUG in an ISR
Perform a stack trace to find the culprit
The period will be doubled on continuation
Use gh to continue!!

Anyone knows why?

Yeah! The ISR watchdog timer has expired. Looks like you’re taking too long in your ISR.


thx @“Peter_Viscarola_(OSR)”
i copy the drivers in safe mode, then reboot, no more time out now.