Installing a custom W7 install disc over a existing W7 install

[videobruce]

I have a stock W7 x64 installed on a GPT drive, no tweaks or updates.
I have a custom W7 boot disc with updates and a number of tweaks I want to install over and replacing this existing O/S to make things easier since many of the changes will save a lot of time and hassle.

This custom W7 x64 (AFAIK) disc (RT7 Lite) wouldn't install to this disc with the GPT error message, so I tried a 'stock' W7 which worked to my surprise.

Will installing W7 over W7 wipe the existing data in the 3 O/S partitions?

Side note the drive itself was already partitioned with the 2nd partition being used for storage. There was no issue here, the original finished install didn't bother this data partition. I hope all of that makes some sense.

 

[garlin]

If Windows Setup finds an existing Windows folder, it should allow you the option of a Custom Install / Upgrade. Which means it renames Windows to Windows.old, and extracts a new Windows instance to the system drive.

RT7 Lite is another W7 modding app, which isn't supported on this forum but you're already familiar with it.

 

[videobruce]

Never got that far, theses other bootable versions are back to the GPT issue and won't do anything.