Dell Precision M4700
Internal SSD: Win 7 Enterprise (Bitlocker)
Internal Hard Drive: Data (Bitlocker)
eSATA: Win 10
I have a Dell Precision M4700 work laptop with Win 7 Enterprise (Bitlocker) installed on a SSD. I use an eSATA hard drive with Win 10 for my personal use. I have been having an issue with the WIN 10 updates. Everytime Win 10 has an update, the computer hangs up and will not boot to Win 10 until I run the repair. Win 7 on SSD has not been affected by this since it is on a different drive. But this last update to Win 10 caused issues. Even after a repair, I could not get Win 10 to boot, so I used a system restore. In this process, it performed a disk check and corrected errors. After the disk repair, Win 10 loaded fine, but when default booting to Win 7 SSD, after the Dell logo comes up and lists the drives, it just displays a black screen with the cursor and nothing happens. I sent it to IT dept and the boot sector had to be redone.
I have two questions:
1) Why would Win 10 affect another operating system on a different drive?
2) How do I prevent Win 10 from affecting Win 7 drive?