Hello there
Today i was trying to install windows 7 over windows 10 my dell desktop.
And it was going well on the iinstallation and i leaved it there go back to do other stuff in the other room .
But when i RETURNED it was showing this message .
'' dell a winpeshl file is present but no commands were successfully launched. this could be caused by incorrect formatting or an invalid executable name. please consult the documentation for more information''
please help me
ThanksYou are installing it on the same HDD as 10 ? ?...Bad idea.Not sure that is a great move as it is not supported... but the main thing I would look out for is the partition type for Windows 7 was MBR in most cases and Windows 10 is GPT in most cases so it will get quite tricky unless you go ahead and format the disk before you get started. That said I think it will be an uphill battle once it is installed because you will need lots of service packs and updates that Microsoft is no longer automatically serving up so you will have to do most of them manually if you need it to PLAY with any current software.It is NEVER recommended to install one OS over another one, even if these are Windows versions. Those, who do it, will always have the SYSTEM bugs, and they will get a bunch of trash and useless files on the computer. One system installed “from ZERO” is OK.Not sure what the you mean when you say you are trying to install Win 7 over Win 10.

Do you mean you are trying to install Win 7 on a Win 10 computer in order to be able to dual boot the 2 OSes? If you are trying to do that on the same disk, it PROBABLY won't work. It is only supported by the OS if you install the newer OS as the 2nd OS. You can install the older OS on a separate disk and then use boot options to select which disk to boot from.

If you are trying to replace Win 10 on an existing computer then you will need to do a clean install. You need to boot from a Win 7 install disk or thumb drive and then delete the existing OS partition and tell the installer to install Win 7 using the previously deleted partition.

If you were going to install Win 10 on a Win 7 computer then you could do what is called an in-place upgrade which would replace Win 7 with Win 10. Some people recommend against doing an in-place upgrade but I have done many in-place upgrades and have never had any issues with it. There is no such thing as an in-place downgrade where you could replace a newer OS with an older OS, it only works going forward.

These are all questions i predict will never be answered...