Windows 10: Deleting info after installing new update

Hello! It's asking me if after installing the latest update if I want to delete the older version. What will be deleted if I say yes?

:)

 

Driver Update/install

Ok, so let me get the basics down first.

1st delete the old driver(software or one by one)
2nd Install new drivers from download
3rd test new drivers

Reboot after steps 1 & 2?

 

ATI Driver install problems

Hi!

There seems to be a kind of a mess after deletion of your current driver.
Have you tried step-by-step drivers update procedure including Driver Sweeper, deleting Prefetch and Temp folders, etc?

 

Windows.old automatically deleted the day after installing Windows 10

A simple websearch would have given you info quicker than complaining about someone suggesting to upgrade to Windows 10 and something causing the Windows.old to be deleted, which I doubt was caused by Microsoft.
Rebuild System Partition

The second way here we can put forward is to rebuild the system partition. If you don't want to pay a penny to do the lost partition recovery, try this method. Note that this requires you have the Windows installation disk. Now follow the instructions to begin.
Preparatory work:
Boot the computer using the Windows installation media for your running OS. Then on the first installation screen, press SHIFT+F10 to bring up the command prompt.
Now run the following commands at the command prompt.
Step 1:
bootrec /fixmbr
Step 2:
diskpart
select disk 0
list partition
select partition n (n is the Windows OS partition)
active
exit (exit diskpart)
Step 3:
bootrec /fixboot
Step 4:
bootrec /rebuildbcd