Quick answer: System Restore can use C drive space, but restore points are useful when updates or drivers break. Reduce usage carefully.
Why this uses C drive space
Restore points help roll back system changes. On small drives, the reserved space may be worth adjusting instead of disabling entirely.
Safe cleanup steps
- Search for Create a restore point.
- Select the C drive and click Configure.
- Review current disk usage.
- Reduce max usage if needed.
- Delete old restore points only if Windows is stable.
What to avoid
Do not disable protection entirely unless you have another backup and recovery plan.
How DiskTidy helps
DiskTidy can help you review temporary files, browser cache, cleanup candidates, and large files before deleting anything. It is designed for local, review-first cleanup instead of blind one-click deletion.