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Temporarily disable the page file and run Ultimate Defrag. Choose the Consolidate defrag option. This will move all data to the beginning of disk and allow you to shrink properly.

(If there is some data written towards the end of the disk, windows treats the entire empty space as used and will not allow you to shrink that space).

Download a trial version of Ultimate Defragmenter. Use the 'consolidate' defragment option. This will move all your data to the beginning of the partition allowing you to resize your partition.

Data is written to the disk randomly by the system. Some of the data can get written to the disk towards the end of the platter. If there is any data on the disk towards the end, then shrink can only reduce the size of the partition up to that point.

Most defrag programs defragment the file in place rather than moving it to the beginning of the disk allowing less space for shrinking.

Follow this method to achieve your objective.

1. Temporarily disable the page file.

2. Run CCleaner to clear off junk from the drive.

3. Delete all restore points except the last (this will free up a lot of space).

4. Temporarily disable your AV (this will make defrag faster)

5. Download and run Ultimate Defrag in 'Conlolidate mode.

6. Now shrink again. You will be able to get much more space available to you for the operation.

7. Re-enable page file and your AV.

You have ample free space and partitioning will not be a problem. In fact you can do that right away even before installing the OS on SSD. Follow these steps -

• Download a trial version of Ultimate Defrag. Defragment your C drive by using the 'Consolidate option'. This will move all data to the beginning of the HDD and ease in creating a partition with more space.

• Now go to 'Disk Management', right click anywhere on the C drive and select 'Shrink Volume'. Go on clicking next/OK on whatever defaults windows shows you.

• You will now see 'Unallocated space' next to your C drive (in Disk Management). Right click anywhere on the unallocated space and select 'New simple volume'. Go on clicking next/ok on all subsequent windows. You will now have a new parttion with a new drive letter assigned to it.

• Move all your personal stuff from the C drive to this new partition.

EDIT: Once the transfer is done, look at the size of the C drive. If you want, you can try to clone the C drive to the SSD. But that will depend on how much space is occupied on the C drive. Post back once you have completed this step and we can look at ways of further reducing the space on the C drive, if you want to take the cloning approach.

Yes, that will work.

If you have trouble in shrinking the HDD partition, install Ultimate Defrag Trial and use the Consolidate option to defrag your HDD. Now you will be able to shrink the partition.

When installing W10TP on the new partition on HDD, unplug your SSD. Plug it back in once the installation completes. Later on you can just get rid of that W10 partition and extend the storage partition.

OK These are the steps

1. Power off your PC and connect the HDD to it.

2. Boot normally to your windows 8.1 installation.

3. Download and install Ultimate defrag. Delete any unwanted files (if any) from the HDD and run the defrag on it in consolidate mode.

4. Go to Run Window and type disk management. In the search window that shows up click on create and format partitions.

5. Select your HDD, right click on it and select 'Shrink volume'. Windows will show you the amount that it can shrink. Change that figure to about 80GB (80000 MB) and click on start. This will create a new blank partition of 80GB to the right of your old drive letter.

6. Click on that 80GB space and right click. Select new simple volume and go on clicking next. You now have a 80 GB partition on which we will install W7.

7. Shut down your computer and remove the SSD.

8. Insert your W7 DVD or bootable USB with W7 in it and change the boot order (by pressing F11 in your case) to boot from DVD/USB.

9. Follow the instructions and install the OS on the 80GB partition we just created. Be careful not to select the partition on which your data exists else you will lose all your data.

10. Once the installation completes, shut down the PC and reconnect the SSD.

11. Now you can choose either disk at startup (pressing F11) to boot from. Your data files will be available to both the operating systems.

Hope that helps. Ask if you have any doubts.

Run Ultimate Defrag on the C drive in 'Consolidate mode'. This will move all the files on the C drive to the beginning of the disk allowing you to shrink more space from it.

Then delete that 13.29 GB partition (if it does not have any important data on it) and create a new partition of about 40GB That is what I will recommend for installing Win 8.1. Though 20GB should suffice, you may run into problems while installing windows updates or a few other programs on it.

OK.

Download Ultimate defrag trial and run it in consolidate mode. This will move all the data on the disk to the beginning of the drive, allowing you to allocate more space for the E drive.

You may want to temporarily disable the pagefile and your AV while the defrag runs. This will speed up the process.

• Check your HDD for issues. Run HD Sentinel.

• Check fragmentation level Anything above than 10% defrag the drive. Use Ultimate Defrag.

• Check startup processes and disable unwanted stuff.

• Check for malwares.

Do you also get this problem when copying large files? Carry out the following checks -

• Ensure that you have sufficient free space on the drive (20% or more is what I consider good).

• Check the fragmentation levels on your HDD. If it's heavily fragmented, defrag it. You can use Ultimate Defragmenter.

• Check the health of your HDD. Run HD Sentinel

• Check the fragmentation level on your drive. If necessary defrag - Ultimate Defrag.

• How much free space does your disk have? You should have at least 15-20% free.

• From an elevated command prompt (run cmd as administrator) run sfc /scannow.

• Check for malware.

• Check the fragmentation level on your drive. If necessary defrag - Ultimate Defrag.

• How much free space does your disk have? You should have at least 15-20% free.

• Run HD Sentinel to check the health of your HDD.

• If all these are OK, check for malware.

That is what I'd do. Create a new partition on the HDD and move by personal stuff there. Then format the old partition containing windows. In case you are unable to get the desired space for the new partition even if there is disk space available, delete the windows folders from the HDD which do not contain data that you want to backup and then run Ultimate Defrag by choosing 'Consolidate option'. Once done, try creating the partition once again.

You will need to defragment the C drive and have all the clusters to which data has been written, moved to the beginning of the drive.

Use Ultimate Defrag (trial version is fine) and use the consolidate option for defragmenting. Disable your antivirus before defrag for faster processing.

Download a free version of Ultimate Defrag. Put your drive for defrag in consolidate mode. This will move all data on your C drive to the start of the disk, allowing you to shrink your C partition.

1. Download a trial version of Ultimate Defrag.

2. Choose the consolidate defrag option to defragment Drive D.

3. Shrink your D Partition and create a new partition E.

4. Copy your files from D to E.

5. Delete partition D.

6. Extend Partition C

7. Change drive letter of E to D.

EDIT: The consolidate method will move all files on D to the beginning, allowing you to shrink it.