Windows 7 install reboot after expanding files

[HeavenKinder]

Hello, i had windows 7 on a ssd, and i upgraded it to windows 10, it got slower so i formated the ssd and went to install the windows 7 again through the cd. Now everytime im trying to install it, it copies the files, starts expanding, restarts, then i have 2 options:
If i boot the cd "press any button in 3 seconds to boot with cd" it restarts the install, and if i dont boot the cd, it says "missing BOOTMGR. Press ctrl+alt+del to restart"... I already formated the ssd everytime the installation restarts, deleted partitions, chkdsk, i have no idea what else to do

 

[HeavenKinder]

Ill try that even tho it doesnt make that much sense since it worked at some point in time in lesd than a month. Ill.come back with updated

 

[ffg7]

HeavenKinder. set the ssd as secondary drive in pc b then run disk management on that ssd to delete "all" partitions, make new partition then format the drive. put the ssd back into pc a as the main drive, boot from your win7 disk, delete the partition on the ssd, make new partition & format the drive. continue installing win 7. had to do that on my upstairs tower when using same drive that I fresh installed win 7 on my downstairs tower then upgraded to win 10.

 

[HeavenKinder]

I will do that as soon as i have a chance, then ill come here and report if it worked or not