Two things that could be causing the problem is System Restore and Indexing. Do you have either or both set for you HDD?
YESSSSSS!!!!
I tried EVERYTHING to solve my problem until I read your post.
I disabled System Restore and also Recycle Bin since Indexing was already disabled.
Recycle Bin: to eliminate deleted things directly instead of "moving it" to the recycle bin.
Now I can "safety remove" my 3 USB WD My Book
Thank you very much!
Thank you very much

My Computer
- Computer type
- Laptop
- Computer Manufacturer/Model Number
- Dell XPS L701X
- OS
- Windows 7 Professional SP1 x64
- CPU
- Mobile QuadCore Intel Core i7-740QM, 2647 MHz (2
- Motherboard
- Dell XPS L701X
- Memory
- 6076 MB (DDR3-1333 DDR3 SDRAM)
- Graphics Card(s)
- NVIDIA GeForce GT 445M (3 GB)
- Antivirus
- Comodo Internet Security 8.0.1.4426
- Browser
- Google Chrome 41.0.2272.101
