This issue occured in October 2015 and may not be relevant now
There is a conflict with updates from Microsoft (KB3088195) and Lenovo (USB Blocker) that can cause a Lenovo computer to Blue Screen (BSOD - Blue Screen of Death)
Windows Vista, 7 and 8 may be affected
Only certain Lenovo models are affected. The laptops that have been affected by this issue are:
- Lenovo B40-30, B40-45, B50-30, B50-45, B40-70, B50-70,
- Lenovo E40-30, E40-70, E50-70
- 300 Series 305-15IBY/305-15IHW/305-15ABM
Remove the pre-installed program
Lenovo USB Blocker.
Boot into safe mode with networking (Advanced Recovery options > Troubleshooting > Advanced Options > Startup Settings [bottom right option] > Restart > Press '5') Then log on, and remove USB Blocker.