I've got a work laptop that's showing over 120 GB of 'Windows System and Reserved' data. I've tried getting help from our IT team, but the local support hasn't been able to resolve it. Despite attempts like disk cleanup, removing temporary files, rebooting, and using an image cleanup script, I'm still stuck with about 95 GB taken up just by system files. Can anyone suggest what I can do to free up space or understand what's causing this?
4 Answers
If all else fails, consider an in-place upgrade. It can clear a lot of accumulated junk without making any changes to your system setup.
The 95 to 120 GB for 'System & Reserved' is often due to hidden system components rather than Windows itself. Common offenders include the Windows Update cache, the WinSxS component store, hibernation files, system restore points, or the pagefile for virtual memory. You might want to try these:
- Run `DISM /Online /Cleanup-Image /AnalyzeComponentStore` to investigate.
- Disable hibernation by using the command `powercfg -h off`.
- Clear any old system restore points.
- Consider using a tool like WinDirStat to find out what's really taking up space. That might help pinpoint if it's the WinSxS store or something like hiberfil.sys causing the bloat.
Why rely on your local IT for a work laptop? It seems like they should have more resources for these issues. Better luck with global support next time!
You should tell your IT that you need a bigger C drive! 120 GB for system files is nuts, especially when you've only got 15 GB of data on the laptop. It’s frustrating, I get it.

Thanks, will try this tomorrow!