I am in big trouble since last few weeks... I am getting 100% disk utilization on my Windows, while I can see no process is significantly using the disk. The issue is faced by many as you can see there are many many threads on this:   on  on    This is how it looks like:    100% disk usage    No process is significantly using the disk    Also I created a thread on   to ask where to find the registry key to tweak HDD driver as recommended by microsoft's site. But of no use.  I tried, stopping many services, clean boot, running process explorer to checks whats using disk the most, as suggested by many online threads. In fact, I formatted by C: drive and installed clean Windows 10. But issue came back!!!  Let me tell me something about my machine: its Dell XPS 15 L502X. Its 2011 edition. It has 16 GB RAM, quad core i7 2630QM. This machine worked perfect with Windows 7,8 and 10 for so many years but now its failing. As I told above I tried everything thats noted in various sites, but nothing helped.   Now I recalled that few months back I was trying to copy paste some big video file to pendrive and I was getting another famous error "Cannot read from source file issue". I didnt paid much attention to it. Left those video files as is. I remember I tried running chkdsk with no success. Now I started feeling that the issue was aggravated. I felt this must be due to  bad sectors. So I cut pasted all files in the drives to external hard disk using TeraCopy software. It gives list of files that failed to copy. So I deleted those files when TeraCopy was not able to move them and then recovered those files using EASEUS recovery tool. Then I hard formatted (not quick format) thinking that it will fix bad sectors. This worked for E: drive.  But while doing same for F: drive, it got all screwed. First while recovering files, I was getting . So I left those files unrecovered and went on to hard format the drive. But now after almost 5 hours its barely 30% done.   One more observation, many times after random killing of processes (mostly onedrive which had folder in F: drive), my disk utility used to come to normal after few minutes.  Q1. So should I conclude its hard disk which is culprit here?    Q2. Will this formatting of F: drive ever complete?  Q3. If completed will my machine be fixed, that is will my machine be free from 100% disk utilization?   Q4. Will my hard disk be safe to use in future for no data loss...  Q5. Should I buy new hard disk?  Q6. Does hard formatting fix bad sectors at all?  Q7. Should I do the same for C: drive too? While installing Windows I did quick format, not hard format.  Sorry for so many questions...but I have wasted many weeks on this. And no thread online is of help to me.
After startup for 5 minutes my system is very slow. The Task Manager shows that the disk usage is at 100%. (Later this number is around 2-4 %, but sometimes for 1-2 minutes go up again at 100%.)  I searched a lot on Google. For example I read , and also other pages. I opened two topic on Microsoft answer.  and one in Hungarian.  But I didn't found the solution yet. So I would like to ask Community's help. :)  Here the steps I already done:   I disabled everything at startups (including services) and the issue is the same.  I disabled Prefetch and Superfetch, the Baground Intellingent Transmission, Windows Search and Windows Defender but the issue is still persists. I made a health check on HDD, I made defrag and file system error check, but there are no errors. Also I tried to reinstall the HDD's driver. I made a full hardware check up, with no errors. The Windows and all the drivers are up-to-date. I tried a clean start. The issue is the same. I deleted Dropbox and all antivirus. I turned of the MSI mode.      I using also Linux, where this error is not occurs. Good to know, that Windows had 4 partitions, but I deleted 2 of them for the Linux. I don't know what partitions was these but both was only 10 - 20 MB.  I using a Dell Inspiron 15R SE 7520 with Windows 10 Home.  Personally I think it can be the Intel Rapid Store Technology "driver", because the problem started around when I installed it. (However I'm not sure.) And my hardware not supported yet by Intel, so I have no the newest driver. However I deleted Intel's software and driver and the issue is the same.    Thank you in advance for your assistance!
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