Resolved Very slow boot up

I think it all started when suddenly Windows crashed with the bluescreen stopcode error. I tried various fixes, including 'restore' (it says restore 'failed'), from the windows 10 disc. I didn't want to reinstall windows losing all m apps and files. But then I finally used the command prompt and tried chkdsk /f. It went through the system and corrected whatever errors it could find. I could boot the computer all right, but it has been so slow that it would take as much as 20-30 to complete the boot. When I put it to sleep it would wakeup with the no desktop screen. Then I force-shut and start again. Again it takes at least 20 minutes. I tried various help suggestions on line such as cleaning startup files, optimizing, etc. etc. but none of them helped. I would appreciate some help on this.

 

I did perform a clean boot. That made it a bit faster, but I don't think it really helped.

 

A "clean boot" is performed by disabling all non-MS services.
You then add the disabled items one at a time to find which is the culprit for slow operation.
Did you use Windows10 Recovery suite?

 

It must be the Windows Recovery suite that I used when I slipped windows 10 cd into the drive.
I think Restore failed because there was not enough space configured for Restore. I created more space.
There just are too many items to (like services and whatnot) to enable one each time. It will take forever, each time to restart. Today's boot time took about 15 minutes. The computer is still slow.

 

Why don't you just backup your data & reinstall Windows ? I have found that reinstalling Windows every couple of years makes it faster & leaner as much of the junk accumulated over the years is thrown out.

 

I think I tried that in one of the very first attempts to fix the problem. If I remember right, I think that attempt failed and that's when I resorted to go to command prompt and used chkdsk /f.

Today, the book time took about 12 minutes or so after disabling many services, processes and startups. That wasn't much help either. Of course, I will keep trying, a bit every day.

 

Check your hard disk for errors. First use chkdsk /r. It would take a while so if possible, let it run overnight. It should fix most of the "soft" errors on your hard disk. If it reports a number of errors, may be your hard disk is failing.
You should also test the hard disk with the manufacturers app.

 

As I said above, I already did that and it did fix errors. Maybe I should run it again. But today when I booted the computer I got this message: does this mean I have buy a new computer?
:“Notice – Hard drive self monitoring system has reported that a parameter has exceeded its normal operating range. Dell recommends that you back up your data regularly. A parameter out of range may or may not indicate a potential hard drive problem. Strike F1 key to continue, F2 to run the setup utility.”

 

With that message Moorty it backs up what rsinfo advised.
Stop using your comp and purchase a new Storage unit. An SSD or HDD whichever fits your pocket.
Clone your old drive to the new and install in your comp.
Your existing drive unit is failing and if you keep using it there is a good chance you will lose your data.
I would advise replacing with a SSD as this will speed up your comp quite noticeably.

 

Since my computer is more than 10 years old, I am ready to buy a new computer, instead of spending money on separate aged products, perhaps also the monitor; but first the computer.

Thank you both, Retiredlearner and RSinfo for your support.