Mysterious software lag
I am hoping someone here may have encountered this issue before and can advise.
About 2 months ago I left my 32GB USB drive plugged in after powering down and when I powered up the next day I got the "No boot manager present" message. I thought my SSD had lost the boot sector so I used EaseUs ToDo recovery disk to recover a backup of my OS. When I tried to boot up afterwards, I still had the error message. It was then I discovered the USB drive still plugged in. So, I removed it and was successful at booting up. However, I noticed that one of the gadgets I had on my desktop was not responding. It was the "Drives Meter". It turned out that it was just working very slowly; like in very slow motion. After failing to determine what the issue was, I removed it from the desktop, but only on my main pc. It still works fine on my laptop.
About a week ago, Firefox rolled out v44.0 and I upgraded. Right away it started crashing and not connecting to web sights. After a frustrating week of this I decided yesterday to try uninstalling BitDefender AV software to see if that was causing the problem. It turned out it was (or so it appears). Firefox is back to normal.
But now I needed to find another AV so I did some research. I decided to try out McAfee (30 day trial) so I downloaded and installed it. After rebooting I found that McAfee would not launch... or so I thought. It was actually taking 10 mins (no exaggeration) to launch, and another several minutes to respond to any buttons or actions. Like it was in a black hole where time was slowed way down. So I called their tech service and Liza logged onto my pc via remote. She tried for 40 mins (again no exaggeration) to get it to work and she could not, and had no solution. So I uninstalled it and put MS Essentials back on (for now).
I can't help thinking that there is some kind of relationship between the very slow operation of the Drive Meters gadget and the very slow operation of the McAfee software. All of the rest of my software progs (and there are many) work fine. I thought maybe the SSD was starting to go bad but after running 2 different diagnostics software progs, and getting a "Good 100%" result, it doesn't appear to be hardware related. I am now wondering if the recovered OS is somehow corrupted. Or, is it possibly something in the registry that has been corrupted?
I would appreciate any advice, suggestions or experiences that may shed some light on this issue. It is very puzzling. Thanks!