Investigate windows instances that aren't logging

[jonathanmetzman]

For example, this testcase: https://clusterfuzz.com/testcase-detail/6277724940206080 analyze task was done by clusterfuzz-windows-j92d minimize task was done by clusterfuzz-windows-ks6r but if you look through the logs, there's almost no logging from these except from the GCEGuestAgent.