I have Windows 7 installed in my computer. Now I want to reinstall it. I have 500 MB free of 19 GB on my C drive. When it comes to the step of selecting a drive to install the OS, it says the C drive does not have enough space. But the concerning issue is it does not show any Format option either, so I cannot reinstall Windows 7.
You need to delete both partitions when you get to that screen so that you see one whole Unallocated space.
There should be a
Drive Options (advanced) button/link in middle-right.
You can refer to the resources below:
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Are you currently logged into your Windows OS while doing this or did you
Boot from disc?
There is also a note at the bottom:
Windows cannot be installed to Disk 0 Partition 1. (Show Details) so I would like to know, what are those details?
I used to like the GUI of the installer. Until making a new partition:
Then select max size and click Apply, this popup i most want to avoid:
If you are fine with the wasted 100MB partition, do this from beginning:
Repair your computer link near bottom left:
When it finished loading, select
Use recovery tools... and click Next:
Command Prompt link:
In the command window, type
diskpart and press Enter. See DiskPart command line options:
I now assume you want Windows 7 to take on single partition on Disk 0. Lines you need to type:
select disk 0 clean create partition primary active assign letter=c format fs=ntfs quick exit exit
Now 1 single active primary partition is ready and formatted as ntfs, close the
System Recovery Options window to return to first screen, click
For Type of Installation, click Custom (advanced). Then click Next (notice the partition is type "System"):