VAIO - Win7 install stopped at the end with black screen

[RomanSVK1]

Hi guys, i have sony vaio laptop - produkt name is SVS1312R9EB which come with win8. I dont like this version of windows and on sony web page was writen that this version (SVS13) can be downgradet to win7. So i formated whole HDD - all partitions to 1 and i started installation of win7. Of course i changed in bios booting to Legacy and first boot is dvd drive. Installation started normally and all was ok, laptop restarts 2 times and after i added name for the PC and serial for win7 and security settings for default (or recommended) , it restarted 3rd time and just black screen appears with blinking cursor. Here its ended. 

Normally after this step should windows starts. So i tried install the win7 on this HDD on second PC if there is no problem with the HDD but win7 has been installed normally so HDD should be ok

I also tried change bios to default settings but same problem. Is there anything else what could be done for solving this problem?

[jan2011]

Hi

I don’t know if this will be useful:

This is the link of Sony UK - Windows 7 Downgrade support

And this is the link of Sony US - Windows Downgrade - BIOS and on step 4 there’s the link of Sony US - Windows 7 Clean Install Instructions for Windows 8 PCs.

Be careful! All drivers here are for another model of VAIO.

Install drivers only from Sony’s UK site Sony UK Support - Vaio SVS1313P9EB Downloads

[RomanSVK1]

Hi, thx for answer, but although i tried it trough Assist button, it ends in same step at the end of the instalation with blinking cursor on black screen. I really dont know what could be wrong. Whole instalation runs normally to the "almost" end and then it stops.

[RomanSVK1]

Hi, i tried to instal win8 and it was without problem, seems that win7 is not possible to install as clean instalation. Now i need to buy new activation key for win8 because on laptop is no sticker with this and also in box was nothing - i get it as gift. Why i didnt make a backup...

[Blencogo]

Hi RomanSVK1.

Windows 8 should activate automatically - licensing permissions are held on the motherboard.

You do not need to buy a new Activation Key as long as you have reinstalled the same version of W8 as was originally installed.

[RomanSVK1]

Has it something to do with BIOS? Because i have restored factory defaults in Bios and erased all Secure boot settings in key management (in Bios). Hopefully this was not the place for storing the key.

[RomanSVK1]

Guys, one last question. I bought original Win8 (not Pro) version and instaled it to the laptop. Window where u can add the key for activation didnt appear  during instalation, just other standard questions like add name, internet connection, etc. After finishing instalation windows runs  and when i checked the system window where is writen if the windows are activated, i found that i have Windows 8 Pro and it is activated.  Means that - the key was added from Mobo and i have 1 Win8 which i can install on some other computer? 

Thx for answer. Roman