You may notice a high HD activity writing to the wiatrace.log file.
WIA stands for Windows Image Acquisition Library.
This is used if you have a Printer scanner installed. Even if you don’t use the Scanner the log file writes debug info to it.
Open the registry and go to :
Change the value to of TRACEFLAGS from 407 to 0
Check the disk activity again, it should be gone now
Alternatively you can stop the Windows Image Acquisition (WIA) Service