The wizard said success. That is the tool's opinion, not a verified result. Ten minutes of checks turn a hopeful extend into a finished job — and a few habits keep you from repeating it.
Partition work is not done when the progress bar closes. It is done when the machine has proved the new layout: correct sizes in two places, one clean boot, real files opening from every partition, and the safety systems you paused — BitLocker, WinRE — confirmed awake again. This final page is that proof, plus the small habits that stop C from refilling at the old rate.
Start with the simplest proof: C's size in Disk Management and its free space in Explorer should agree with what you planned. If Disk Management shows the larger partition but Explorer still reports the old size, a restart almost always reconciles them — the file system occasionally needs one boot to notice its new borders. If the size did not change at all, the operation did not apply: go back to the tool's queue or the wizard result rather than assuming, and do not stack a second attempt on top of an unexplained first one.
Restart the PC and watch it come up cleanly — no BitLocker recovery screen (if one appears, this is the moment your saved recovery key earns its keep; enter it, boot, and confirm protection resumes), no automatic repair, no missing-boot-device detour. Then open a handful of real files from every partition on the disk: a document from C, media from the partition that was moved, anything from D. Partition work fails at the map level, and files that open are the proof the map is honest. This ten-minute ritual is what separates "the tool said success" from "the machine is verified".
Suspension was a surgical pause, not a new policy. Confirm BitLocker protection is On again with manage-bde -status C: — suspension normally expires after a couple of restarts, but verify rather than assume, and re-enable manually with manage-bde -protectors -enable C: if needed. If the recovery partition was moved or rebuilt, reagentc /info should show WinRE enabled on the right partition. And keep the pre-work backup for a few days of normal use before deleting it — the faults that partition work shakes loose, if any exist, announce themselves quickly.
The honest ending: extending treated the symptom, and C will fill again at exactly the old rate if the cause is untouched. The cause is almost never Windows itself — it is the things that grow: game libraries, downloaded installers, chat-app media caches, and user folders that default to C. The durable habits are unglamorous: move the big libraries and game installs to D, point new programs at D when the installer offers the choice, let Storage Sense clear temporary files, and give C a quick size check every few months so a refill is a chore and not a crisis. You have already done the hard part once; keeping the space is just housekeeping.
Watch the verification done on the real machine after the extend, in the full video.
▶️ Watch Full VideoUsually nothing — the file system view sometimes lags the partition change until a restart. Reboot once and check again in both Explorer and Disk Management. If Disk Management also shows the old size, the extend genuinely did not apply, and you should review the tool's result or the wizard's final screen before trying anything else.
That prompt is BitLocker doing its job — the disk layout changed, so it asked for proof of ownership before trusting the boot. Enter the key, let Windows start, then confirm protection shows as On. It is only a problem if you do not have the key, which is why the safety case in this series insists on confirming it before any partition is touched.
A few days of completely normal use is a sensible rule. Partition problems that exist will surface in that window — a boot issue, a partition that misbehaves, an application complaining. Once the machine has worked normally through restarts and real work, retiring the backup is reasonable. There is also no harm in simply keeping it until the disk's next big change.