Solved Computer extrtemely slow

After defragmenting my C and D drives a couple of days ago i find that Windows 10 is slow to load. Even more annoying is that when I try to open Word or Excel they take so long to open that Windows asks me if I wish to continue or close the program. If I try to open an Excel file via Computer Excel opens with a blank page. I don't know if this is significant, but Spybot Search and Destroy, Malwarebytes and other such programs all come to a stop before finishing. They don't freeze but appear to be examining one file for an interminable period.

I also cannot restart or shut down from the desktop (nothing happens). My only solution is to turn off the computer by switching it off at the box. When I turn it back on and I find that the computer is working at its normal pace. I mentioned defragmentation at the begining of this post but it was only after I did this that the problem began.

Should I do a System Restore or is the another way of correcting the problem?

 

I used Defraggler. Both C and D drives are on my hard drive.

 

Same problem this morning. The only way I can overcome it is to physically turn off the computer then turn it on again. I hope this work this morning. I find that when I run Defraggler there is always a lot to defragment on Drive C even though Windows' own defragmenter has had a long time to run. Do you think I should remove Defraggler?

Apart from the above, how can I get rid of the problem? Should I do a system restore back to a point where the problem did not exist?

 

I will do a System Restore in the hope that it works. I've removed Defraggler as I no longer think I need it. Incidentally, the problem only occurs when I first turn on the computer in the morning. Once I've turned it off then on via the box (I can't shut down from the computer) the problem is gone for the day By that I mean that I can reboot the pc as often as I kike without the problem recurring. Weird?

 

I did a system restore back a few days to when the problem didn't occur. This proved to be disaster because once the restore had finished the computer restarted but couldn't load windows. I tried every trick in my limited book without success. This was hampered by the fact that the keyboard and mouse didn't work. At some point I got an error message telling me that the problem was related to the BIOS (I forget the actual wording). To cut a long story short, I hae given up and takn the omputer to my local computer store. Thanks for your suggestions.

 

I have just got the computer back from the repair shop. The repairer thought it might have been a result of a recent Windows update. After trying everything he knew he ended up installing the latest version of Windows 10 Pro over my malfunctioning original Windows 10. I have spent most of the day reinstalling programs however I have just about finished.

Thanks for your advice.