New
#31
Your 100MB system reserved is almost certainly your problem (as indicated earlier in the thread). It needs ideally 50MB free for a shadow copy when imaging. 38MB is way under.
1) Temporarily assign a letter to system reserved in Disk Management
2) enable show hidden and system files
3) You can now see it's contents. Post a screen shot of the contents
Depending what's in there, there is a cleanup operation that can be used.