Hello saidas108, welcome to Seven Forums!
Please post a snip/screen-shot of Windows disk management so we can have a look, in the Windows start menu right click computer and click manage, in the left pane of the "Computer Management" window that opens click disk management and post a maximized snip of that. How to Upload and Post a Screenshot and File in Seven Forums
If there isn't a new Windows 7 "System Reserved" partition present you will have issues using Windows 7 Backup and Restore
programs., after you post the snip, have a look at the information below, among other things, it outlines how to create a "System Reserved" partition.
Whether you use diskpart to run either the clean all command to completely wipe a HDD / SSD or just the clean command to remove the format configuration data and don't use diskpart to create at least a single partition to do the installation to, letting the Windows installer do the format you will end up with the new Windows 7 System Reserved partition, if you want to make your own decision whether this partition is added, study these two (2) options below.
- Then if you do not want to create the new Windows 7 "System Reserved" partition use the outline in Step Two #2 to create, format and mark Active a single 100GB partition to do the installation to.
- If you do want to create the "System Reserved" partition use the outline in Step Two #3 to create, format and mark Active the System Reserved partition and then create and format the 100GB partition to do the installation to.
Either way, running the "clean all" then creating and formatting the partition(s) using diskpart will get you the best possible space to do a clean install
of Windows 7 to; you can always extend
the Windows partition to include the remaining unallocated space on the HDD / SSD or create
additional Primary partitions or an Extended
partition after the installation completes if you choose. SSD / HDD : Optimize for Windows Reinstallation DISKPART : At PC Startup Do a Clean Install with a Upgrade Windows 7 Version